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Finding the Fourth Proportional to 77,061.25, 115,591.88 and 21,657.25

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Solution

The fourth proportional to 77,061.25, 115,591.88 and 21,657.25 is: 32,485.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,061.25 : 115,591.88 = 21,657.25 : x
  2. Step 2: Convert to fraction form
    77,061.25/115,591.88 = 21,657.25/x
  3. Step 3: Cross multiply
    77,061.25x = 115,591.88 × 21,657.25
  4. Step 4: Simplify right side
    77,061.25x = 2,503,402,134.84
  5. Step 5: Solve for x
    x = 2,503,402,134.84/77,061.25
  6. Step 6: Final answer
    x = 32,485.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.