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Finding the Fourth Proportional to 77,889.79, 107,487.96 and 42,079.79

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Solution

The fourth proportional to 77,889.79, 107,487.96 and 42,079.79 is: 58,070.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,889.79 : 107,487.96 = 42,079.79 : x
  2. Step 2: Convert to fraction form
    77,889.79/107,487.96 = 42,079.79/x
  3. Step 3: Cross multiply
    77,889.79x = 107,487.96 × 42,079.79
  4. Step 4: Simplify right side
    77,889.79x = 4,523,070,246.89
  5. Step 5: Solve for x
    x = 4,523,070,246.89/77,889.79
  6. Step 6: Final answer
    x = 58,070.13

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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.