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Finding the Fourth Proportional to 495,079.60, 742,647.88 and 140,063.88

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Solution

The fourth proportional to 495,079.60, 742,647.88 and 140,063.88 is: 210,103.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,079.60 : 742,647.88 = 140,063.88 : x
  2. Step 2: Convert to fraction form
    495,079.60/742,647.88 = 140,063.88/x
  3. Step 3: Cross multiply
    495,079.60x = 742,647.88 × 140,063.88
  4. Step 4: Simplify right side
    495,079.60x = 104,018,143,546.57
  5. Step 5: Solve for x
    x = 104,018,143,546.57/495,079.60
  6. Step 6: Final answer
    x = 210,103.88

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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.