Home / 107,139.20-160,555.20-78,838.40

Finding the Fourth Proportional to 107,139.20, 160,555.20 and 78,838.40

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Solution

The fourth proportional to 107,139.20, 160,555.20 and 78,838.40 is: 118,144.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,139.20 : 160,555.20 = 78,838.40 : x
  2. Step 2: Convert to fraction form
    107,139.20/160,555.20 = 78,838.40/x
  3. Step 3: Cross multiply
    107,139.20x = 160,555.20 × 78,838.40
  4. Step 4: Simplify right side
    107,139.20x = 12,657,915,079.68
  5. Step 5: Solve for x
    x = 12,657,915,079.68/107,139.20
  6. Step 6: Final answer
    x = 118,144.57

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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.