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Finding the Fourth Proportional to 88,448.76, 121,978.17 and 65,844.90

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Solution

The fourth proportional to 88,448.76, 121,978.17 and 65,844.90 is: 90,805.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,448.76 : 121,978.17 = 65,844.90 : x
  2. Step 2: Convert to fraction form
    88,448.76/121,978.17 = 65,844.90/x
  3. Step 3: Cross multiply
    88,448.76x = 121,978.17 × 65,844.90
  4. Step 4: Simplify right side
    88,448.76x = 8,031,640,405.83
  5. Step 5: Solve for x
    x = 8,031,640,405.83/88,448.76
  6. Step 6: Final answer
    x = 90,805.57

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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.