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Finding the Fourth Proportional to 153,660.71, 212,036.29 and 85,671.29

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Solution

The fourth proportional to 153,660.71, 212,036.29 and 85,671.29 is: 118,217.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,660.71 : 212,036.29 = 85,671.29 : x
  2. Step 2: Convert to fraction form
    153,660.71/212,036.29 = 85,671.29/x
  3. Step 3: Cross multiply
    153,660.71x = 212,036.29 × 85,671.29
  4. Step 4: Simplify right side
    153,660.71x = 18,165,422,807.03
  5. Step 5: Solve for x
    x = 18,165,422,807.03/153,660.71
  6. Step 6: Final answer
    x = 118,217.74

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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.