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Finding the Fourth Proportional to 155,989.80, 215,259.12 and 88,008.12

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Solution

The fourth proportional to 155,989.80, 215,259.12 and 88,008.12 is: 121,447.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,989.80 : 215,259.12 = 88,008.12 : x
  2. Step 2: Convert to fraction form
    155,989.80/215,259.12 = 88,008.12/x
  3. Step 3: Cross multiply
    155,989.80x = 215,259.12 × 88,008.12
  4. Step 4: Simplify right side
    155,989.80x = 18,944,550,464.05
  5. Step 5: Solve for x
    x = 18,944,550,464.05/155,989.80
  6. Step 6: Final answer
    x = 121,447.37

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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.