Home / 91,339,911.28-137,126,786.40-78,468,410.32

Finding the Fourth Proportional to 91,339,911.28, 137,126,786.40 and 78,468,410.32

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Solution

The fourth proportional to 91,339,911.28, 137,126,786.40 and 78,468,410.32 is: 117,803,058.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,339,911.28 : 137,126,786.40 = 78,468,410.32 : x
  2. Step 2: Convert to fraction form
    91,339,911.28/137,126,786.40 = 78,468,410.32/x
  3. Step 3: Cross multiply
    91,339,911.28x = 137,126,786.40 × 78,468,410.32
  4. Step 4: Simplify right side
    91,339,911.28x = 10,760,120,941,098,196
  5. Step 5: Solve for x
    x = 10,760,120,941,098,196/91,339,911.28
  6. Step 6: Final answer
    x = 117,803,058.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.