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Finding the Fourth Proportional to 90,937.71, 125,490.74 and 53,211.15

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Solution

The fourth proportional to 90,937.71, 125,490.74 and 53,211.15 is: 73,429.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,937.71 : 125,490.74 = 53,211.15 : x
  2. Step 2: Convert to fraction form
    90,937.71/125,490.74 = 53,211.15/x
  3. Step 3: Cross multiply
    90,937.71x = 125,490.74 × 53,211.15
  4. Step 4: Simplify right side
    90,937.71x = 6,677,506,323.70
  5. Step 5: Solve for x
    x = 6,677,506,323.70/90,937.71
  6. Step 6: Final answer
    x = 73,429.45

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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.