Home / 138,467.28-191,088.82-78,034.58

Finding the Fourth Proportional to 138,467.28, 191,088.82 and 78,034.58

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Solution

The fourth proportional to 138,467.28, 191,088.82 and 78,034.58 is: 107,689.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,467.28 : 191,088.82 = 78,034.58 : x
  2. Step 2: Convert to fraction form
    138,467.28/191,088.82 = 78,034.58/x
  3. Step 3: Cross multiply
    138,467.28x = 191,088.82 × 78,034.58
  4. Step 4: Simplify right side
    138,467.28x = 14,911,535,811.40
  5. Step 5: Solve for x
    x = 14,911,535,811.40/138,467.28
  6. Step 6: Final answer
    x = 107,689.96

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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.