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Finding the Fourth Proportional to 245,459.16, 338,731.52 and 138,026.90

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Solution

The fourth proportional to 245,459.16, 338,731.52 and 138,026.90 is: 190,475.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,459.16 : 338,731.52 = 138,026.90 : x
  2. Step 2: Convert to fraction form
    245,459.16/338,731.52 = 138,026.90/x
  3. Step 3: Cross multiply
    245,459.16x = 338,731.52 × 138,026.90
  4. Step 4: Simplify right side
    245,459.16x = 46,754,061,794.58
  5. Step 5: Solve for x
    x = 46,754,061,794.58/245,459.16
  6. Step 6: Final answer
    x = 190,475.93

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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.