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Finding the Fourth Proportional to 112,456.62, 155,197.62 and 64,721.70

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Solution

The fourth proportional to 112,456.62, 155,197.62 and 64,721.70 is: 89,320.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,456.62 : 155,197.62 = 64,721.70 : x
  2. Step 2: Convert to fraction form
    112,456.62/155,197.62 = 64,721.70/x
  3. Step 3: Cross multiply
    112,456.62x = 155,197.62 × 64,721.70
  4. Step 4: Simplify right side
    112,456.62x = 10,044,653,802.35
  5. Step 5: Solve for x
    x = 10,044,653,802.35/112,456.62
  6. Step 6: Final answer
    x = 89,320.25

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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.