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Finding the Fourth Proportional to 77,487.66, 106,923.92 and 43,488.72

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Solution

The fourth proportional to 77,487.66, 106,923.92 and 43,488.72 is: 60,009.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,487.66 : 106,923.92 = 43,488.72 : x
  2. Step 2: Convert to fraction form
    77,487.66/106,923.92 = 43,488.72/x
  3. Step 3: Cross multiply
    77,487.66x = 106,923.92 × 43,488.72
  4. Step 4: Simplify right side
    77,487.66x = 4,649,984,200.74
  5. Step 5: Solve for x
    x = 4,649,984,200.74/77,487.66
  6. Step 6: Final answer
    x = 60,009.35

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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.