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Finding the Fourth Proportional to 105,630.30, 157,344.93 and 100,020.60

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Solution

The fourth proportional to 105,630.30, 157,344.93 and 100,020.60 is: 148,988.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,630.30 : 157,344.93 = 100,020.60 : x
  2. Step 2: Convert to fraction form
    105,630.30/157,344.93 = 100,020.60/x
  3. Step 3: Cross multiply
    105,630.30x = 157,344.93 × 100,020.60
  4. Step 4: Simplify right side
    105,630.30x = 15,737,734,305.56
  5. Step 5: Solve for x
    x = 15,737,734,305.56/105,630.30
  6. Step 6: Final answer
    x = 148,988.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.