Home / 142,017.18-195,994.71-78,360.54

Finding the Fourth Proportional to 142,017.18, 195,994.71 and 78,360.54

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Solution

The fourth proportional to 142,017.18, 195,994.71 and 78,360.54 is: 108,143.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,017.18 : 195,994.71 = 78,360.54 : x
  2. Step 2: Convert to fraction form
    142,017.18/195,994.71 = 78,360.54/x
  3. Step 3: Cross multiply
    142,017.18x = 195,994.71 × 78,360.54
  4. Step 4: Simplify right side
    142,017.18x = 15,358,251,312.74
  5. Step 5: Solve for x
    x = 15,358,251,312.74/142,017.18
  6. Step 6: Final answer
    x = 108,143.62

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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.