Home / 66,279.17-91,430.40-39,402.56

Finding the Fourth Proportional to 66,279.17, 91,430.40 and 39,402.56

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Solution

The fourth proportional to 66,279.17, 91,430.40 and 39,402.56 is: 54,354.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,279.17 : 91,430.40 = 39,402.56 : x
  2. Step 2: Convert to fraction form
    66,279.17/91,430.40 = 39,402.56/x
  3. Step 3: Cross multiply
    66,279.17x = 91,430.40 × 39,402.56
  4. Step 4: Simplify right side
    66,279.17x = 3,602,592,198.16
  5. Step 5: Solve for x
    x = 3,602,592,198.16/66,279.17
  6. Step 6: Final answer
    x = 54,354.82

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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.