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Finding the Fourth Proportional to 90,630.30, 125,115.30 and 56,657.70

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Solution

The fourth proportional to 90,630.30, 125,115.30 and 56,657.70 is: 78,216.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,630.30 : 125,115.30 = 56,657.70 : x
  2. Step 2: Convert to fraction form
    90,630.30/125,115.30 = 56,657.70/x
  3. Step 3: Cross multiply
    90,630.30x = 125,115.30 × 56,657.70
  4. Step 4: Simplify right side
    90,630.30x = 7,088,745,132.81
  5. Step 5: Solve for x
    x = 7,088,745,132.81/90,630.30
  6. Step 6: Final answer
    x = 78,216.06

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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.