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Finding the Fourth Proportional to 109,387.60, 153,609.20 and 109,387.60

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Solution

The fourth proportional to 109,387.60, 153,609.20 and 109,387.60 is: 153,609.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,387.60 : 153,609.20 = 109,387.60 : x
  2. Step 2: Convert to fraction form
    109,387.60/153,609.20 = 109,387.60/x
  3. Step 3: Cross multiply
    109,387.60x = 153,609.20 × 109,387.60
  4. Step 4: Simplify right side
    109,387.60x = 16,802,941,725.92
  5. Step 5: Solve for x
    x = 16,802,941,725.92/109,387.60
  6. Step 6: Final answer
    x = 153,609.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.