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Finding the Fourth Proportional to 89,909.84, 123,770.76 and 77,260.88

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Solution

The fourth proportional to 89,909.84, 123,770.76 and 77,260.88 is: 106,358.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,909.84 : 123,770.76 = 77,260.88 : x
  2. Step 2: Convert to fraction form
    89,909.84/123,770.76 = 77,260.88/x
  3. Step 3: Cross multiply
    89,909.84x = 123,770.76 × 77,260.88
  4. Step 4: Simplify right side
    89,909.84x = 9,562,637,835.87
  5. Step 5: Solve for x
    x = 9,562,637,835.87/89,909.84
  6. Step 6: Final answer
    x = 106,358.08

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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.