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Finding the Fourth Proportional to 77,486.28, 106,913.62 and 45,658.12

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Solution

The fourth proportional to 77,486.28, 106,913.62 and 45,658.12 is: 62,997.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,486.28 : 106,913.62 = 45,658.12 : x
  2. Step 2: Convert to fraction form
    77,486.28/106,913.62 = 45,658.12/x
  3. Step 3: Cross multiply
    77,486.28x = 106,913.62 × 45,658.12
  4. Step 4: Simplify right side
    77,486.28x = 4,881,474,891.59
  5. Step 5: Solve for x
    x = 4,881,474,891.59/77,486.28
  6. Step 6: Final answer
    x = 62,997.93

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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.