Home / 138,386.20-207,233.70-91,384.60

Finding the Fourth Proportional to 138,386.20, 207,233.70 and 91,384.60

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Solution

The fourth proportional to 138,386.20, 207,233.70 and 91,384.60 is: 136,848.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,386.20 : 207,233.70 = 91,384.60 : x
  2. Step 2: Convert to fraction form
    138,386.20/207,233.70 = 91,384.60/x
  3. Step 3: Cross multiply
    138,386.20x = 207,233.70 × 91,384.60
  4. Step 4: Simplify right side
    138,386.20x = 18,937,968,781.02
  5. Step 5: Solve for x
    x = 18,937,968,781.02/138,386.20
  6. Step 6: Final answer
    x = 136,848.68

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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.