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Finding the Fourth Proportional to 70,445.70, 106,186.14 and 66,380.31

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Solution

The fourth proportional to 70,445.70, 106,186.14 and 66,380.31 is: 100,058.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,445.70 : 106,186.14 = 66,380.31 : x
  2. Step 2: Convert to fraction form
    70,445.70/106,186.14 = 66,380.31/x
  3. Step 3: Cross multiply
    70,445.70x = 106,186.14 × 66,380.31
  4. Step 4: Simplify right side
    70,445.70x = 7,048,668,890.90
  5. Step 5: Solve for x
    x = 7,048,668,890.90/70,445.70
  6. Step 6: Final answer
    x = 100,058.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.