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Finding the Fourth Proportional to 343,777.60, 515,666.40 and 107,139.28

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Solution

The fourth proportional to 343,777.60, 515,666.40 and 107,139.28 is: 160,708.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,777.60 : 515,666.40 = 107,139.28 : x
  2. Step 2: Convert to fraction form
    343,777.60/515,666.40 = 107,139.28/x
  3. Step 3: Cross multiply
    343,777.60x = 515,666.40 × 107,139.28
  4. Step 4: Simplify right side
    343,777.60x = 55,248,126,816.19
  5. Step 5: Solve for x
    x = 55,248,126,816.19/343,777.60
  6. Step 6: Final answer
    x = 160,708.92

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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.