Home / 138,049,123.70-190,511,779.05-76,173,448.07

Finding the Fourth Proportional to 138,049,123.70, 190,511,779.05 and 76,173,448.07

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Solution

The fourth proportional to 138,049,123.70, 190,511,779.05 and 76,173,448.07 is: 105,121,559.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,049,123.70 : 190,511,779.05 = 76,173,448.07 : x
  2. Step 2: Convert to fraction form
    138,049,123.70/190,511,779.05 = 76,173,448.07/x
  3. Step 3: Cross multiply
    138,049,123.70x = 190,511,779.05 × 76,173,448.07
  4. Step 4: Simplify right side
    138,049,123.70x = 14,511,939,107,235,930
  5. Step 5: Solve for x
    x = 14,511,939,107,235,930/138,049,123.70
  6. Step 6: Final answer
    x = 105,121,559.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.