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Finding the Fourth Proportional to 78,881.16, 117,637.53 and 67,269

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Solution

The fourth proportional to 78,881.16, 117,637.53 and 67,269 is: 100,320.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,881.16 : 117,637.53 = 67,269 : x
  2. Step 2: Convert to fraction form
    78,881.16/117,637.53 = 67,269/x
  3. Step 3: Cross multiply
    78,881.16x = 117,637.53 × 67,269
  4. Step 4: Simplify right side
    78,881.16x = 7,913,359,005.57
  5. Step 5: Solve for x
    x = 7,913,359,005.57/78,881.16
  6. Step 6: Final answer
    x = 100,320.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.