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Finding the Fourth Proportional to 138,547.76, 207,820.38 and 43,777.94

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Solution

The fourth proportional to 138,547.76, 207,820.38 and 43,777.94 is: 65,666.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,547.76 : 207,820.38 = 43,777.94 : x
  2. Step 2: Convert to fraction form
    138,547.76/207,820.38 = 43,777.94/x
  3. Step 3: Cross multiply
    138,547.76x = 207,820.38 × 43,777.94
  4. Step 4: Simplify right side
    138,547.76x = 9,097,947,087.32
  5. Step 5: Solve for x
    x = 9,097,947,087.32/138,547.76
  6. Step 6: Final answer
    x = 65,666.51

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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.