Home / 142,022.16-195,990.56-78,360.08

Finding the Fourth Proportional to 142,022.16, 195,990.56 and 78,360.08

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Solution

The fourth proportional to 142,022.16, 195,990.56 and 78,360.08 is: 108,136.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,022.16 : 195,990.56 = 78,360.08 : x
  2. Step 2: Convert to fraction form
    142,022.16/195,990.56 = 78,360.08/x
  3. Step 3: Cross multiply
    142,022.16x = 195,990.56 × 78,360.08
  4. Step 4: Simplify right side
    142,022.16x = 15,357,835,960.84
  5. Step 5: Solve for x
    x = 15,357,835,960.84/142,022.16
  6. Step 6: Final answer
    x = 108,136.90

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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.