Home / 138,441.51-191,049.35-74,779.31

Finding the Fourth Proportional to 138,441.51, 191,049.35 and 74,779.31

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Solution

The fourth proportional to 138,441.51, 191,049.35 and 74,779.31 is: 103,195.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,441.51 : 191,049.35 = 74,779.31 : x
  2. Step 2: Convert to fraction form
    138,441.51/191,049.35 = 74,779.31/x
  3. Step 3: Cross multiply
    138,441.51x = 191,049.35 × 74,779.31
  4. Step 4: Simplify right side
    138,441.51x = 14,286,537,239.81
  5. Step 5: Solve for x
    x = 14,286,537,239.81/138,441.51
  6. Step 6: Final answer
    x = 103,195.47

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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.