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Finding the Fourth Proportional to 347,688.60, 521,532.90 and 126,043.80

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Solution

The fourth proportional to 347,688.60, 521,532.90 and 126,043.80 is: 189,065.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,688.60 : 521,532.90 = 126,043.80 : x
  2. Step 2: Convert to fraction form
    347,688.60/521,532.90 = 126,043.80/x
  3. Step 3: Cross multiply
    347,688.60x = 521,532.90 × 126,043.80
  4. Step 4: Simplify right side
    347,688.60x = 65,735,988,541.02
  5. Step 5: Solve for x
    x = 65,735,988,541.02/347,688.60
  6. Step 6: Final answer
    x = 189,065.70

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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.