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Finding the Fourth Proportional to 128,218.34, 176,932.05 and 70,856.98

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Solution

The fourth proportional to 128,218.34, 176,932.05 and 70,856.98 is: 97,777.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,218.34 : 176,932.05 = 70,856.98 : x
  2. Step 2: Convert to fraction form
    128,218.34/176,932.05 = 70,856.98/x
  3. Step 3: Cross multiply
    128,218.34x = 176,932.05 × 70,856.98
  4. Step 4: Simplify right side
    128,218.34x = 12,536,870,020.17
  5. Step 5: Solve for x
    x = 12,536,870,020.17/128,218.34
  6. Step 6: Final answer
    x = 97,777.51

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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.