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Finding the Fourth Proportional to 76,151.47, 105,144.47 and 61,126.78

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Solution

The fourth proportional to 76,151.47, 105,144.47 and 61,126.78 is: 84,399.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,151.47 : 105,144.47 = 61,126.78 : x
  2. Step 2: Convert to fraction form
    76,151.47/105,144.47 = 61,126.78/x
  3. Step 3: Cross multiply
    76,151.47x = 105,144.47 × 61,126.78
  4. Step 4: Simplify right side
    76,151.47x = 6,427,142,885.91
  5. Step 5: Solve for x
    x = 6,427,142,885.91/76,151.47
  6. Step 6: Final answer
    x = 84,399.46

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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.