Home / 138,437.72-191,044.07-74,775.53

Finding the Fourth Proportional to 138,437.72, 191,044.07 and 74,775.53

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Solution

The fourth proportional to 138,437.72, 191,044.07 and 74,775.53 is: 103,190.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,437.72 : 191,044.07 = 74,775.53 : x
  2. Step 2: Convert to fraction form
    138,437.72/191,044.07 = 74,775.53/x
  3. Step 3: Cross multiply
    138,437.72x = 191,044.07 × 74,775.53
  4. Step 4: Simplify right side
    138,437.72x = 14,285,420,258.51
  5. Step 5: Solve for x
    x = 14,285,420,258.51/138,437.72
  6. Step 6: Final answer
    x = 103,190.23

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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.