Home / 138,607.27-191,277.10-78,178.41

Finding the Fourth Proportional to 138,607.27, 191,277.10 and 78,178.41

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Solution

The fourth proportional to 138,607.27, 191,277.10 and 78,178.41 is: 107,885.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,607.27 : 191,277.10 = 78,178.41 : x
  2. Step 2: Convert to fraction form
    138,607.27/191,277.10 = 78,178.41/x
  3. Step 3: Cross multiply
    138,607.27x = 191,277.10 × 78,178.41
  4. Step 4: Simplify right side
    138,607.27x = 14,953,739,547.41
  5. Step 5: Solve for x
    x = 14,953,739,547.41/138,607.27
  6. Step 6: Final answer
    x = 107,885.68

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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.