Home / 142,013.07-195,980.31-78,350.85

Finding the Fourth Proportional to 142,013.07, 195,980.31 and 78,350.85

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Solution

The fourth proportional to 142,013.07, 195,980.31 and 78,350.85 is: 108,125.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,013.07 : 195,980.31 = 78,350.85 : x
  2. Step 2: Convert to fraction form
    142,013.07/195,980.31 = 78,350.85/x
  3. Step 3: Cross multiply
    142,013.07x = 195,980.31 × 78,350.85
  4. Step 4: Simplify right side
    142,013.07x = 15,355,223,871.76
  5. Step 5: Solve for x
    x = 15,355,223,871.76/142,013.07
  6. Step 6: Final answer
    x = 108,125.43

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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.