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Finding the Fourth Proportional to 155,884.52, 215,107.62 and 87,918.20

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Solution

The fourth proportional to 155,884.52, 215,107.62 and 87,918.20 is: 121,319.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,884.52 : 215,107.62 = 87,918.20 : x
  2. Step 2: Convert to fraction form
    155,884.52/215,107.62 = 87,918.20/x
  3. Step 3: Cross multiply
    155,884.52x = 215,107.62 × 87,918.20
  4. Step 4: Simplify right side
    155,884.52x = 18,911,874,756.68
  5. Step 5: Solve for x
    x = 18,911,874,756.68/155,884.52
  6. Step 6: Final answer
    x = 121,319.77

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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.