Home / 131,728.15-181,784.64-71,298.78

Finding the Fourth Proportional to 131,728.15, 181,784.64 and 71,298.78

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Solution

The fourth proportional to 131,728.15, 181,784.64 and 71,298.78 is: 98,392.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,728.15 : 181,784.64 = 71,298.78 : x
  2. Step 2: Convert to fraction form
    131,728.15/181,784.64 = 71,298.78/x
  3. Step 3: Cross multiply
    131,728.15x = 181,784.64 × 71,298.78
  4. Step 4: Simplify right side
    131,728.15x = 12,961,023,054.74
  5. Step 5: Solve for x
    x = 12,961,023,054.74/131,728.15
  6. Step 6: Final answer
    x = 98,392.20

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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.