Home / 143,802.56-198,445.20-80,138.72

Finding the Fourth Proportional to 143,802.56, 198,445.20 and 80,138.72

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Solution

The fourth proportional to 143,802.56, 198,445.20 and 80,138.72 is: 110,590.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,802.56 : 198,445.20 = 80,138.72 : x
  2. Step 2: Convert to fraction form
    143,802.56/198,445.20 = 80,138.72/x
  3. Step 3: Cross multiply
    143,802.56x = 198,445.20 × 80,138.72
  4. Step 4: Simplify right side
    143,802.56x = 15,903,144,318.14
  5. Step 5: Solve for x
    x = 15,903,144,318.14/143,802.56
  6. Step 6: Final answer
    x = 110,590.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.