Home / 138,438.11-191,044.58-74,775.89

Finding the Fourth Proportional to 138,438.11, 191,044.58 and 74,775.89

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Solution

The fourth proportional to 138,438.11, 191,044.58 and 74,775.89 is: 103,190.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,438.11 : 191,044.58 = 74,775.89 : x
  2. Step 2: Convert to fraction form
    138,438.11/191,044.58 = 74,775.89/x
  3. Step 3: Cross multiply
    138,438.11x = 191,044.58 × 74,775.89
  4. Step 4: Simplify right side
    138,438.11x = 14,285,528,602.91
  5. Step 5: Solve for x
    x = 14,285,528,602.91/138,438.11
  6. Step 6: Final answer
    x = 103,190.72

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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.