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Finding the Fourth Proportional to 64,121.80, 96,036.90 and 40,502.20

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Solution

The fourth proportional to 64,121.80, 96,036.90 and 40,502.20 is: 60,661.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,121.80 : 96,036.90 = 40,502.20 : x
  2. Step 2: Convert to fraction form
    64,121.80/96,036.90 = 40,502.20/x
  3. Step 3: Cross multiply
    64,121.80x = 96,036.90 × 40,502.20
  4. Step 4: Simplify right side
    64,121.80x = 3,889,705,731.18
  5. Step 5: Solve for x
    x = 3,889,705,731.18/64,121.80
  6. Step 6: Final answer
    x = 60,661.21

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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.