Home / 103,629.90-155,444.85-78,746.70

Finding the Fourth Proportional to 103,629.90, 155,444.85 and 78,746.70

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Solution

The fourth proportional to 103,629.90, 155,444.85 and 78,746.70 is: 118,120.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,629.90 : 155,444.85 = 78,746.70 : x
  2. Step 2: Convert to fraction form
    103,629.90/155,444.85 = 78,746.70/x
  3. Step 3: Cross multiply
    103,629.90x = 155,444.85 × 78,746.70
  4. Step 4: Simplify right side
    103,629.90x = 12,240,768,969.50
  5. Step 5: Solve for x
    x = 12,240,768,969.50/103,629.90
  6. Step 6: Final answer
    x = 118,120.05

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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.