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Finding the Fourth Proportional to 155,900.76, 215,127.93 and 87,928.32

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Solution

The fourth proportional to 155,900.76, 215,127.93 and 87,928.32 is: 121,332.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,900.76 : 215,127.93 = 87,928.32 : x
  2. Step 2: Convert to fraction form
    155,900.76/215,127.93 = 87,928.32/x
  3. Step 3: Cross multiply
    155,900.76x = 215,127.93 × 87,928.32
  4. Step 4: Simplify right side
    155,900.76x = 18,915,837,469.98
  5. Step 5: Solve for x
    x = 18,915,837,469.98/155,900.76
  6. Step 6: Final answer
    x = 121,332.55

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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.