Home / 258,631.60-387,947.86-81,152.24

Finding the Fourth Proportional to 258,631.60, 387,947.86 and 81,152.24

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Solution

The fourth proportional to 258,631.60, 387,947.86 and 81,152.24 is: 121,728.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,631.60 : 387,947.86 = 81,152.24 : x
  2. Step 2: Convert to fraction form
    258,631.60/387,947.86 = 81,152.24/x
  3. Step 3: Cross multiply
    258,631.60x = 387,947.86 × 81,152.24
  4. Step 4: Simplify right side
    258,631.60x = 31,482,837,842.21
  5. Step 5: Solve for x
    x = 31,482,837,842.21/258,631.60
  6. Step 6: Final answer
    x = 121,728.50

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Similar ratio
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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.