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Finding the Fourth Proportional to 71,330.50, 98,439.05 and 39,499.40

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Solution

The fourth proportional to 71,330.50, 98,439.05 and 39,499.40 is: 54,510.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,330.50 : 98,439.05 = 39,499.40 : x
  2. Step 2: Convert to fraction form
    71,330.50/98,439.05 = 39,499.40/x
  3. Step 3: Cross multiply
    71,330.50x = 98,439.05 × 39,499.40
  4. Step 4: Simplify right side
    71,330.50x = 3,888,283,411.57
  5. Step 5: Solve for x
    x = 3,888,283,411.57/71,330.50
  6. Step 6: Final answer
    x = 54,510.81

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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.