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Finding the Fourth Proportional to 118,616.70, 163,689.54 and 64,901.16

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Solution

The fourth proportional to 118,616.70, 163,689.54 and 64,901.16 is: 89,562.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,616.70 : 163,689.54 = 64,901.16 : x
  2. Step 2: Convert to fraction form
    118,616.70/163,689.54 = 64,901.16/x
  3. Step 3: Cross multiply
    118,616.70x = 163,689.54 × 64,901.16
  4. Step 4: Simplify right side
    118,616.70x = 10,623,641,025.87
  5. Step 5: Solve for x
    x = 10,623,641,025.87/118,616.70
  6. Step 6: Final answer
    x = 89,562.78

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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.