Home / 142,028.90-195,999.75-78,366.71

Finding the Fourth Proportional to 142,028.90, 195,999.75 and 78,366.71

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Solution

The fourth proportional to 142,028.90, 195,999.75 and 78,366.71 is: 108,145.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,028.90 : 195,999.75 = 78,366.71 : x
  2. Step 2: Convert to fraction form
    142,028.90/195,999.75 = 78,366.71/x
  3. Step 3: Cross multiply
    142,028.90x = 195,999.75 × 78,366.71
  4. Step 4: Simplify right side
    142,028.90x = 15,359,854,588.32
  5. Step 5: Solve for x
    x = 15,359,854,588.32/142,028.90
  6. Step 6: Final answer
    x = 108,145.98

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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.