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Finding the Fourth Proportional to 113,425.40, 169,878.90 and 66,769.40

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Solution

The fourth proportional to 113,425.40, 169,878.90 and 66,769.40 is: 100,001.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,425.40 : 169,878.90 = 66,769.40 : x
  2. Step 2: Convert to fraction form
    113,425.40/169,878.90 = 66,769.40/x
  3. Step 3: Cross multiply
    113,425.40x = 169,878.90 × 66,769.40
  4. Step 4: Simplify right side
    113,425.40x = 11,342,712,225.66
  5. Step 5: Solve for x
    x = 11,342,712,225.66/113,425.40
  6. Step 6: Final answer
    x = 100,001.52

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1.5x scale

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.