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Finding the Fourth Proportional to 206,938.40, 310,364.40 and 88,613.60

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Solution

The fourth proportional to 206,938.40, 310,364.40 and 88,613.60 is: 132,901.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,938.40 : 310,364.40 = 88,613.60 : x
  2. Step 2: Convert to fraction form
    206,938.40/310,364.40 = 88,613.60/x
  3. Step 3: Cross multiply
    206,938.40x = 310,364.40 × 88,613.60
  4. Step 4: Simplify right side
    206,938.40x = 27,502,506,795.84
  5. Step 5: Solve for x
    x = 27,502,506,795.84/206,938.40
  6. Step 6: Final answer
    x = 132,901.90

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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.