Home / 135,010.10-186,336.69-78,454.28

Finding the Fourth Proportional to 135,010.10, 186,336.69 and 78,454.28

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Solution

The fourth proportional to 135,010.10, 186,336.69 and 78,454.28 is: 108,280.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,010.10 : 186,336.69 = 78,454.28 : x
  2. Step 2: Convert to fraction form
    135,010.10/186,336.69 = 78,454.28/x
  3. Step 3: Cross multiply
    135,010.10x = 186,336.69 × 78,454.28
  4. Step 4: Simplify right side
    135,010.10x = 14,618,911,023.17
  5. Step 5: Solve for x
    x = 14,618,911,023.17/135,010.10
  6. Step 6: Final answer
    x = 108,280.13

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1.5x scale

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.