Home / 153,691.11-212,094.66-85,712.40

Finding the Fourth Proportional to 153,691.11, 212,094.66 and 85,712.40

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Solution

The fourth proportional to 153,691.11, 212,094.66 and 85,712.40 is: 118,283.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,691.11 : 212,094.66 = 85,712.40 : x
  2. Step 2: Convert to fraction form
    153,691.11/212,094.66 = 85,712.40/x
  3. Step 3: Cross multiply
    153,691.11x = 212,094.66 × 85,712.40
  4. Step 4: Simplify right side
    153,691.11x = 18,179,142,335.78
  5. Step 5: Solve for x
    x = 18,179,142,335.78/153,691.11
  6. Step 6: Final answer
    x = 118,283.63

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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.