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Finding the Fourth Proportional to 90,458.52, 124,688.52 and 71,307.06

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Solution

The fourth proportional to 90,458.52, 124,688.52 and 71,307.06 is: 98,290.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,458.52 : 124,688.52 = 71,307.06 : x
  2. Step 2: Convert to fraction form
    90,458.52/124,688.52 = 71,307.06/x
  3. Step 3: Cross multiply
    90,458.52x = 124,688.52 × 71,307.06
  4. Step 4: Simplify right side
    90,458.52x = 8,891,171,776.95
  5. Step 5: Solve for x
    x = 8,891,171,776.95/90,458.52
  6. Step 6: Final answer
    x = 98,290.04

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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.