Home / 138,607.07-191,277.50-78,177.53

Finding the Fourth Proportional to 138,607.07, 191,277.50 and 78,177.53

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Solution

The fourth proportional to 138,607.07, 191,277.50 and 78,177.53 is: 107,884.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,607.07 : 191,277.50 = 78,177.53 : x
  2. Step 2: Convert to fraction form
    138,607.07/191,277.50 = 78,177.53/x
  3. Step 3: Cross multiply
    138,607.07x = 191,277.50 × 78,177.53
  4. Step 4: Simplify right side
    138,607.07x = 14,953,602,494.58
  5. Step 5: Solve for x
    x = 14,953,602,494.58/138,607.07
  6. Step 6: Final answer
    x = 107,884.85

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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.