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Finding the Fourth Proportional to 316,420.56, 474,706.98 and 129,432.60

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Solution

The fourth proportional to 316,420.56, 474,706.98 and 129,432.60 is: 194,180.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,420.56 : 474,706.98 = 129,432.60 : x
  2. Step 2: Convert to fraction form
    316,420.56/474,706.98 = 129,432.60/x
  3. Step 3: Cross multiply
    316,420.56x = 474,706.98 × 129,432.60
  4. Step 4: Simplify right side
    316,420.56x = 61,442,558,659.55
  5. Step 5: Solve for x
    x = 61,442,558,659.55/316,420.56
  6. Step 6: Final answer
    x = 194,180.05

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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.