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Finding the Fourth Proportional to 330,686.51, 495,939.65 and 90,743.52

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Solution

The fourth proportional to 330,686.51, 495,939.65 and 90,743.52 is: 136,090.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,686.51 : 495,939.65 = 90,743.52 : x
  2. Step 2: Convert to fraction form
    330,686.51/495,939.65 = 90,743.52/x
  3. Step 3: Cross multiply
    330,686.51x = 495,939.65 × 90,743.52
  4. Step 4: Simplify right side
    330,686.51x = 45,003,309,094.85
  5. Step 5: Solve for x
    x = 45,003,309,094.85/330,686.51
  6. Step 6: Final answer
    x = 136,090.55

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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.