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Finding the Fourth Proportional to 112,988.80, 169,022.40 and 101,929.60

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Solution

The fourth proportional to 112,988.80, 169,022.40 and 101,929.60 is: 152,478.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,988.80 : 169,022.40 = 101,929.60 : x
  2. Step 2: Convert to fraction form
    112,988.80/169,022.40 = 101,929.60/x
  3. Step 3: Cross multiply
    112,988.80x = 169,022.40 × 101,929.60
  4. Step 4: Simplify right side
    112,988.80x = 17,228,385,623.04
  5. Step 5: Solve for x
    x = 17,228,385,623.04/112,988.80
  6. Step 6: Final answer
    x = 152,478.70

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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.