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Finding the Fourth Proportional to 153,319.90, 211,581.14 and 86,251.90

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Solution

The fourth proportional to 153,319.90, 211,581.14 and 86,251.90 is: 119,027.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,319.90 : 211,581.14 = 86,251.90 : x
  2. Step 2: Convert to fraction form
    153,319.90/211,581.14 = 86,251.90/x
  3. Step 3: Cross multiply
    153,319.90x = 211,581.14 × 86,251.90
  4. Step 4: Simplify right side
    153,319.90x = 18,249,275,329.17
  5. Step 5: Solve for x
    x = 18,249,275,329.17/153,319.90
  6. Step 6: Final answer
    x = 119,027.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.