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Finding the Fourth Proportional to 128,123.17, 176,808.42 and 70,764.84

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Solution

The fourth proportional to 128,123.17, 176,808.42 and 70,764.84 is: 97,654.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,123.17 : 176,808.42 = 70,764.84 : x
  2. Step 2: Convert to fraction form
    128,123.17/176,808.42 = 70,764.84/x
  3. Step 3: Cross multiply
    128,123.17x = 176,808.42 × 70,764.84
  4. Step 4: Simplify right side
    128,123.17x = 12,511,819,551.95
  5. Step 5: Solve for x
    x = 12,511,819,551.95/128,123.17
  6. Step 6: Final answer
    x = 97,654.62

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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.