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Finding the Fourth Proportional to 90,627.70, 135,807.90 and 65,720.20

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Solution

The fourth proportional to 90,627.70, 135,807.90 and 65,720.20 is: 98,483.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,627.70 : 135,807.90 = 65,720.20 : x
  2. Step 2: Convert to fraction form
    90,627.70/135,807.90 = 65,720.20/x
  3. Step 3: Cross multiply
    90,627.70x = 135,807.90 × 65,720.20
  4. Step 4: Simplify right side
    90,627.70x = 8,925,322,349.58
  5. Step 5: Solve for x
    x = 8,925,322,349.58/90,627.70
  6. Step 6: Final answer
    x = 98,483.38

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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.