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Finding the Fourth Proportional to 215,331, 322,999.38 and 67,587

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Solution

The fourth proportional to 215,331, 322,999.38 and 67,587 is: 101,381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,331 : 322,999.38 = 67,587 : x
  2. Step 2: Convert to fraction form
    215,331/322,999.38 = 67,587/x
  3. Step 3: Cross multiply
    215,331x = 322,999.38 × 67,587
  4. Step 4: Simplify right side
    215,331x = 21,830,559,096.06
  5. Step 5: Solve for x
    x = 21,830,559,096.06/215,331
  6. Step 6: Final answer
    x = 101,381.40

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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.