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Finding the Fourth Proportional to 128,047.98, 176,705.18 and 74,337.98

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Solution

The fourth proportional to 128,047.98, 176,705.18 and 74,337.98 is: 102,585.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,047.98 : 176,705.18 = 74,337.98 : x
  2. Step 2: Convert to fraction form
    128,047.98/176,705.18 = 74,337.98/x
  3. Step 3: Cross multiply
    128,047.98x = 176,705.18 × 74,337.98
  4. Step 4: Simplify right side
    128,047.98x = 13,135,906,136.74
  5. Step 5: Solve for x
    x = 13,135,906,136.74/128,047.98
  6. Step 6: Final answer
    x = 102,585.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.