Home / 280,607.78-387,213.34-158,120.10

Finding the Fourth Proportional to 280,607.78, 387,213.34 and 158,120.10

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Solution

The fourth proportional to 280,607.78, 387,213.34 and 158,120.10 is: 218,191.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,607.78 : 387,213.34 = 158,120.10 : x
  2. Step 2: Convert to fraction form
    280,607.78/387,213.34 = 158,120.10/x
  3. Step 3: Cross multiply
    280,607.78x = 387,213.34 × 158,120.10
  4. Step 4: Simplify right side
    280,607.78x = 61,226,213,111.74
  5. Step 5: Solve for x
    x = 61,226,213,111.74/280,607.78
  6. Step 6: Final answer
    x = 218,191.43

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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.