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Finding the Fourth Proportional to 121,283, 181,702.84 and 87,920.32

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Solution

The fourth proportional to 121,283, 181,702.84 and 87,920.32 is: 131,719.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,283 : 181,702.84 = 87,920.32 : x
  2. Step 2: Convert to fraction form
    121,283/181,702.84 = 87,920.32/x
  3. Step 3: Cross multiply
    121,283x = 181,702.84 × 87,920.32
  4. Step 4: Simplify right side
    121,283x = 15,975,371,837.71
  5. Step 5: Solve for x
    x = 15,975,371,837.71/121,283
  6. Step 6: Final answer
    x = 131,719.79

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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.