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Finding the Fourth Proportional to 75,123.45, 112,463.74 and 55,489.66

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Solution

The fourth proportional to 75,123.45, 112,463.74 and 55,489.66 is: 83,070.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,123.45 : 112,463.74 = 55,489.66 : x
  2. Step 2: Convert to fraction form
    75,123.45/112,463.74 = 55,489.66/x
  3. Step 3: Cross multiply
    75,123.45x = 112,463.74 × 55,489.66
  4. Step 4: Simplify right side
    75,123.45x = 6,240,574,483.13
  5. Step 5: Solve for x
    x = 6,240,574,483.13/75,123.45
  6. Step 6: Final answer
    x = 83,070.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.