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Finding the Fourth Proportional to 88,720.10, 133,080.15 and 85,220.90

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Solution

The fourth proportional to 88,720.10, 133,080.15 and 85,220.90 is: 127,831.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,720.10 : 133,080.15 = 85,220.90 : x
  2. Step 2: Convert to fraction form
    88,720.10/133,080.15 = 85,220.90/x
  3. Step 3: Cross multiply
    88,720.10x = 133,080.15 × 85,220.90
  4. Step 4: Simplify right side
    88,720.10x = 11,341,210,155.14
  5. Step 5: Solve for x
    x = 11,341,210,155.14/88,720.10
  6. Step 6: Final answer
    x = 127,831.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.