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Finding the Fourth Proportional to 156,721.96, 216,276.28 and 89,653.96

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Solution

The fourth proportional to 156,721.96, 216,276.28 and 89,653.96 is: 123,722.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,721.96 : 216,276.28 = 89,653.96 : x
  2. Step 2: Convert to fraction form
    156,721.96/216,276.28 = 89,653.96/x
  3. Step 3: Cross multiply
    156,721.96x = 216,276.28 × 89,653.96
  4. Step 4: Simplify right side
    156,721.96x = 19,390,024,956.07
  5. Step 5: Solve for x
    x = 19,390,024,956.07/156,721.96
  6. Step 6: Final answer
    x = 123,722.45

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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.