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Finding the Fourth Proportional to 511,959.16, 767,886.90 and 138,019.96

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Solution

The fourth proportional to 511,959.16, 767,886.90 and 138,019.96 is: 207,015.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,959.16 : 767,886.90 = 138,019.96 : x
  2. Step 2: Convert to fraction form
    511,959.16/767,886.90 = 138,019.96/x
  3. Step 3: Cross multiply
    511,959.16x = 767,886.90 × 138,019.96
  4. Step 4: Simplify right side
    511,959.16x = 105,983,719,222.52
  5. Step 5: Solve for x
    x = 105,983,719,222.52/511,959.16
  6. Step 6: Final answer
    x = 207,015.96

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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.