Home / 107,142.20-160,559.70-78,841.40

Finding the Fourth Proportional to 107,142.20, 160,559.70 and 78,841.40

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Solution

The fourth proportional to 107,142.20, 160,559.70 and 78,841.40 is: 118,149.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,142.20 : 160,559.70 = 78,841.40 : x
  2. Step 2: Convert to fraction form
    107,142.20/160,559.70 = 78,841.40/x
  3. Step 3: Cross multiply
    107,142.20x = 160,559.70 × 78,841.40
  4. Step 4: Simplify right side
    107,142.20x = 12,658,751,531.58
  5. Step 5: Solve for x
    x = 12,658,751,531.58/107,142.20
  6. Step 6: Final answer
    x = 118,149.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.