Home / 258,631.35-387,946.67-81,152.21

Finding the Fourth Proportional to 258,631.35, 387,946.67 and 81,152.21

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Solution

The fourth proportional to 258,631.35, 387,946.67 and 81,152.21 is: 121,728.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,631.35 : 387,946.67 = 81,152.21 : x
  2. Step 2: Convert to fraction form
    258,631.35/387,946.67 = 81,152.21/x
  3. Step 3: Cross multiply
    258,631.35x = 387,946.67 × 81,152.21
  4. Step 4: Simplify right side
    258,631.35x = 31,482,727,287.15
  5. Step 5: Solve for x
    x = 31,482,727,287.15/258,631.35
  6. Step 6: Final answer
    x = 121,728.19

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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.