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Finding the Fourth Proportional to 103,635.40, 155,337.90 and 56,921.80

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Solution

The fourth proportional to 103,635.40, 155,337.90 and 56,921.80 is: 85,319.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,635.40 : 155,337.90 = 56,921.80 : x
  2. Step 2: Convert to fraction form
    103,635.40/155,337.90 = 56,921.80/x
  3. Step 3: Cross multiply
    103,635.40x = 155,337.90 × 56,921.80
  4. Step 4: Simplify right side
    103,635.40x = 8,842,112,876.22
  5. Step 5: Solve for x
    x = 8,842,112,876.22/103,635.40
  6. Step 6: Final answer
    x = 85,319.43

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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.