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Finding the Fourth Proportional to 64,478.60, 96,717.90 and 42,360.20

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Solution

The fourth proportional to 64,478.60, 96,717.90 and 42,360.20 is: 63,540.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,478.60 : 96,717.90 = 42,360.20 : x
  2. Step 2: Convert to fraction form
    64,478.60/96,717.90 = 42,360.20/x
  3. Step 3: Cross multiply
    64,478.60x = 96,717.90 × 42,360.20
  4. Step 4: Simplify right side
    64,478.60x = 4,096,989,587.58
  5. Step 5: Solve for x
    x = 4,096,989,587.58/64,478.60
  6. Step 6: Final answer
    x = 63,540.30

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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.