Home / 103,683.35-155,689.05-78,751.55

Finding the Fourth Proportional to 103,683.35, 155,689.05 and 78,751.55

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Solution

The fourth proportional to 103,683.35, 155,689.05 and 78,751.55 is: 118,251.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,683.35 : 155,689.05 = 78,751.55 : x
  2. Step 2: Convert to fraction form
    103,683.35/155,689.05 = 78,751.55/x
  3. Step 3: Cross multiply
    103,683.35x = 155,689.05 × 78,751.55
  4. Step 4: Simplify right side
    103,683.35x = 12,260,754,005.53
  5. Step 5: Solve for x
    x = 12,260,754,005.53/103,683.35
  6. Step 6: Final answer
    x = 118,251.91

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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.