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Finding the Fourth Proportional to 71,330.40, 98,434.80 and 39,499.20

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Solution

The fourth proportional to 71,330.40, 98,434.80 and 39,499.20 is: 54,508.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,330.40 : 98,434.80 = 39,499.20 : x
  2. Step 2: Convert to fraction form
    71,330.40/98,434.80 = 39,499.20/x
  3. Step 3: Cross multiply
    71,330.40x = 98,434.80 × 39,499.20
  4. Step 4: Simplify right side
    71,330.40x = 3,888,095,852.16
  5. Step 5: Solve for x
    x = 3,888,095,852.16/71,330.40
  6. Step 6: Final answer
    x = 54,508.26

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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.