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Finding the Fourth Proportional to 118,781.19, 163,918.08 and 65,068.13

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Solution

The fourth proportional to 118,781.19, 163,918.08 and 65,068.13 is: 89,794.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,781.19 : 163,918.08 = 65,068.13 : x
  2. Step 2: Convert to fraction form
    118,781.19/163,918.08 = 65,068.13/x
  3. Step 3: Cross multiply
    118,781.19x = 163,918.08 × 65,068.13
  4. Step 4: Simplify right side
    118,781.19x = 10,665,842,938.79
  5. Step 5: Solve for x
    x = 10,665,842,938.79/118,781.19
  6. Step 6: Final answer
    x = 89,794.04

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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.