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Finding the Fourth Proportional to 112,616, 155,411.20 and 62,316.08

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Solution

The fourth proportional to 112,616, 155,411.20 and 62,316.08 is: 85,996.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,616 : 155,411.20 = 62,316.08 : x
  2. Step 2: Convert to fraction form
    112,616/155,411.20 = 62,316.08/x
  3. Step 3: Cross multiply
    112,616x = 155,411.20 × 62,316.08
  4. Step 4: Simplify right side
    112,616x = 9,684,616,772.10
  5. Step 5: Solve for x
    x = 9,684,616,772.10/112,616
  6. Step 6: Final answer
    x = 85,996.81

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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.