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Finding the Fourth Proportional to 113,658.84, 156,784.95 and 71,143.56

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Solution

The fourth proportional to 113,658.84, 156,784.95 and 71,143.56 is: 98,137.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,658.84 : 156,784.95 = 71,143.56 : x
  2. Step 2: Convert to fraction form
    113,658.84/156,784.95 = 71,143.56/x
  3. Step 3: Cross multiply
    113,658.84x = 156,784.95 × 71,143.56
  4. Step 4: Simplify right side
    113,658.84x = 11,154,239,497.42
  5. Step 5: Solve for x
    x = 11,154,239,497.42/113,658.84
  6. Step 6: Final answer
    x = 98,137.90

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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.