Home / 138,608.02-191,278.14-78,179.16

Finding the Fourth Proportional to 138,608.02, 191,278.14 and 78,179.16

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Solution

The fourth proportional to 138,608.02, 191,278.14 and 78,179.16 is: 107,886.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,608.02 : 191,278.14 = 78,179.16 : x
  2. Step 2: Convert to fraction form
    138,608.02/191,278.14 = 78,179.16/x
  3. Step 3: Cross multiply
    138,608.02x = 191,278.14 × 78,179.16
  4. Step 4: Simplify right side
    138,608.02x = 14,953,964,311.56
  5. Step 5: Solve for x
    x = 14,953,964,311.56/138,608.02
  6. Step 6: Final answer
    x = 107,886.72

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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.