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Finding the Fourth Proportional to 136,656.80, 204,985.20 and 89,962.40

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Solution

The fourth proportional to 136,656.80, 204,985.20 and 89,962.40 is: 134,943.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,656.80 : 204,985.20 = 89,962.40 : x
  2. Step 2: Convert to fraction form
    136,656.80/204,985.20 = 89,962.40/x
  3. Step 3: Cross multiply
    136,656.80x = 204,985.20 × 89,962.40
  4. Step 4: Simplify right side
    136,656.80x = 18,440,960,556.48
  5. Step 5: Solve for x
    x = 18,440,960,556.48/136,656.80
  6. Step 6: Final answer
    x = 134,943.60

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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.