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Finding the Fourth Proportional to 162,145.68, 243,053.28 and 91,876.56

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Solution

The fourth proportional to 162,145.68, 243,053.28 and 91,876.56 is: 137,721.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,145.68 : 243,053.28 = 91,876.56 : x
  2. Step 2: Convert to fraction form
    162,145.68/243,053.28 = 91,876.56/x
  3. Step 3: Cross multiply
    162,145.68x = 243,053.28 × 91,876.56
  4. Step 4: Simplify right side
    162,145.68x = 22,330,899,263.12
  5. Step 5: Solve for x
    x = 22,330,899,263.12/162,145.68
  6. Step 6: Final answer
    x = 137,721.21

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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.