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Finding the Fourth Proportional to 136,885.80, 205,328.70 and 89,647.40

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Solution

The fourth proportional to 136,885.80, 205,328.70 and 89,647.40 is: 134,471.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,885.80 : 205,328.70 = 89,647.40 : x
  2. Step 2: Convert to fraction form
    136,885.80/205,328.70 = 89,647.40/x
  3. Step 3: Cross multiply
    136,885.80x = 205,328.70 × 89,647.40
  4. Step 4: Simplify right side
    136,885.80x = 18,407,184,100.38
  5. Step 5: Solve for x
    x = 18,407,184,100.38/136,885.80
  6. Step 6: Final answer
    x = 134,471.10

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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.