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Finding the Fourth Proportional to 118,129.80, 163,013.12 and 64,414.38

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Solution

The fourth proportional to 118,129.80, 163,013.12 and 64,414.38 is: 88,888.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,129.80 : 163,013.12 = 64,414.38 : x
  2. Step 2: Convert to fraction form
    118,129.80/163,013.12 = 64,414.38/x
  3. Step 3: Cross multiply
    118,129.80x = 163,013.12 × 64,414.38
  4. Step 4: Simplify right side
    118,129.80x = 10,500,389,056.67
  5. Step 5: Solve for x
    x = 10,500,389,056.67/118,129.80
  6. Step 6: Final answer
    x = 88,888.57

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1.5x scale

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.