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Finding the Fourth Proportional to 118,616.40, 163,689.12 and 64,900.80

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Solution

The fourth proportional to 118,616.40, 163,689.12 and 64,900.80 is: 89,562.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,616.40 : 163,689.12 = 64,900.80 : x
  2. Step 2: Convert to fraction form
    118,616.40/163,689.12 = 64,900.80/x
  3. Step 3: Cross multiply
    118,616.40x = 163,689.12 × 64,900.80
  4. Step 4: Simplify right side
    118,616.40x = 10,623,554,839.30
  5. Step 5: Solve for x
    x = 10,623,554,839.30/118,616.40
  6. Step 6: Final answer
    x = 89,562.28

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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.