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Finding the Fourth Proportional to 140,948.71, 211,390.70 and 84,038.71

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Solution

The fourth proportional to 140,948.71, 211,390.70 and 84,038.71 is: 126,038.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,948.71 : 211,390.70 = 84,038.71 : x
  2. Step 2: Convert to fraction form
    140,948.71/211,390.70 = 84,038.71/x
  3. Step 3: Cross multiply
    140,948.71x = 211,390.70 × 84,038.71
  4. Step 4: Simplify right side
    140,948.71x = 17,765,001,734.00
  5. Step 5: Solve for x
    x = 17,765,001,734.00/140,948.71
  6. Step 6: Final answer
    x = 126,038.77

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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.