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Finding the Fourth Proportional to 140,953.40, 211,430.10 and 138,879.80

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Solution

The fourth proportional to 140,953.40, 211,430.10 and 138,879.80 is: 208,319.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,953.40 : 211,430.10 = 138,879.80 : x
  2. Step 2: Convert to fraction form
    140,953.40/211,430.10 = 138,879.80/x
  3. Step 3: Cross multiply
    140,953.40x = 211,430.10 × 138,879.80
  4. Step 4: Simplify right side
    140,953.40x = 29,363,370,001.98
  5. Step 5: Solve for x
    x = 29,363,370,001.98/140,953.40
  6. Step 6: Final answer
    x = 208,319.70

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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.