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Finding the Fourth Proportional to 155,781.63, 214,985.07 and 87,801.48

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Solution

The fourth proportional to 155,781.63, 214,985.07 and 87,801.48 is: 121,169.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,781.63 : 214,985.07 = 87,801.48 : x
  2. Step 2: Convert to fraction form
    155,781.63/214,985.07 = 87,801.48/x
  3. Step 3: Cross multiply
    155,781.63x = 214,985.07 × 87,801.48
  4. Step 4: Simplify right side
    155,781.63x = 18,876,007,323.90
  5. Step 5: Solve for x
    x = 18,876,007,323.90/155,781.63
  6. Step 6: Final answer
    x = 121,169.66

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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.