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Finding the Fourth Proportional to 71,329.50, 98,437.67 and 39,498.40

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Solution

The fourth proportional to 71,329.50, 98,437.67 and 39,498.40 is: 54,509.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,329.50 : 98,437.67 = 39,498.40 : x
  2. Step 2: Convert to fraction form
    71,329.50/98,437.67 = 39,498.40/x
  3. Step 3: Cross multiply
    71,329.50x = 98,437.67 × 39,498.40
  4. Step 4: Simplify right side
    71,329.50x = 3,888,130,464.73
  5. Step 5: Solve for x
    x = 3,888,130,464.73/71,329.50
  6. Step 6: Final answer
    x = 54,509.43

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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.