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Finding the Fourth Proportional to 67,065.09, 100,623.15 and 42,077.40

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Solution

The fourth proportional to 67,065.09, 100,623.15 and 42,077.40 is: 63,132.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,065.09 : 100,623.15 = 42,077.40 : x
  2. Step 2: Convert to fraction form
    67,065.09/100,623.15 = 42,077.40/x
  3. Step 3: Cross multiply
    67,065.09x = 100,623.15 × 42,077.40
  4. Step 4: Simplify right side
    67,065.09x = 4,233,960,531.81
  5. Step 5: Solve for x
    x = 4,233,960,531.81/67,065.09
  6. Step 6: Final answer
    x = 63,132.11

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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.