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Finding the Fourth Proportional to 495,139.80, 742,709.70 and 140,149.20

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Solution

The fourth proportional to 495,139.80, 742,709.70 and 140,149.20 is: 210,223.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,139.80 : 742,709.70 = 140,149.20 : x
  2. Step 2: Convert to fraction form
    495,139.80/742,709.70 = 140,149.20/x
  3. Step 3: Cross multiply
    495,139.80x = 742,709.70 × 140,149.20
  4. Step 4: Simplify right side
    495,139.80x = 104,090,170,287.24
  5. Step 5: Solve for x
    x = 104,090,170,287.24/495,139.80
  6. Step 6: Final answer
    x = 210,223.80

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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.