Home / 100,101.15-138,139.58-54,779.15

Finding the Fourth Proportional to 100,101.15, 138,139.58 and 54,779.15

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Solution

The fourth proportional to 100,101.15, 138,139.58 and 54,779.15 is: 75,595.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,101.15 : 138,139.58 = 54,779.15 : x
  2. Step 2: Convert to fraction form
    100,101.15/138,139.58 = 54,779.15/x
  3. Step 3: Cross multiply
    100,101.15x = 138,139.58 × 54,779.15
  4. Step 4: Simplify right side
    100,101.15x = 7,567,167,809.16
  5. Step 5: Solve for x
    x = 7,567,167,809.16/100,101.15
  6. Step 6: Final answer
    x = 75,595.21

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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.