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Finding the Fourth Proportional to 147,381.81, 220,861.53 and 84,070.95

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Solution

The fourth proportional to 147,381.81, 220,861.53 and 84,070.95 is: 125,985.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,381.81 : 220,861.53 = 84,070.95 : x
  2. Step 2: Convert to fraction form
    147,381.81/220,861.53 = 84,070.95/x
  3. Step 3: Cross multiply
    147,381.81x = 220,861.53 × 84,070.95
  4. Step 4: Simplify right side
    147,381.81x = 18,568,038,645.55
  5. Step 5: Solve for x
    x = 18,568,038,645.55/147,381.81
  6. Step 6: Final answer
    x = 125,985.96

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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.