Home / 138,607.30-191,277.15-78,178.47

Finding the Fourth Proportional to 138,607.30, 191,277.15 and 78,178.47

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Solution

The fourth proportional to 138,607.30, 191,277.15 and 78,178.47 is: 107,885.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,607.30 : 191,277.15 = 78,178.47 : x
  2. Step 2: Convert to fraction form
    138,607.30/191,277.15 = 78,178.47/x
  3. Step 3: Cross multiply
    138,607.30x = 191,277.15 × 78,178.47
  4. Step 4: Simplify right side
    138,607.30x = 14,953,753,922.50
  5. Step 5: Solve for x
    x = 14,953,753,922.50/138,607.30
  6. Step 6: Final answer
    x = 107,885.76

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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.