Home / 126,153.12-174,026.16-78,388.32

Finding the Fourth Proportional to 126,153.12, 174,026.16 and 78,388.32

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Solution

The fourth proportional to 126,153.12, 174,026.16 and 78,388.32 is: 108,135.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,153.12 : 174,026.16 = 78,388.32 : x
  2. Step 2: Convert to fraction form
    126,153.12/174,026.16 = 78,388.32/x
  3. Step 3: Cross multiply
    126,153.12x = 174,026.16 × 78,388.32
  4. Step 4: Simplify right side
    126,153.12x = 13,641,618,318.45
  5. Step 5: Solve for x
    x = 13,641,618,318.45/126,153.12
  6. Step 6: Final answer
    x = 108,135.40

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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.