Home / 131,809.08-181,889.32-78,099.04

Finding the Fourth Proportional to 131,809.08, 181,889.32 and 78,099.04

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Solution

The fourth proportional to 131,809.08, 181,889.32 and 78,099.04 is: 107,772.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,809.08 : 181,889.32 = 78,099.04 : x
  2. Step 2: Convert to fraction form
    131,809.08/181,889.32 = 78,099.04/x
  3. Step 3: Cross multiply
    131,809.08x = 181,889.32 × 78,099.04
  4. Step 4: Simplify right side
    131,809.08x = 14,205,381,278.25
  5. Step 5: Solve for x
    x = 14,205,381,278.25/131,809.08
  6. Step 6: Final answer
    x = 107,772.40

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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.