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Finding the Fourth Proportional to 153,319.40, 211,580.42 and 86,251.40

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Solution

The fourth proportional to 153,319.40, 211,580.42 and 86,251.40 is: 119,026.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,319.40 : 211,580.42 = 86,251.40 : x
  2. Step 2: Convert to fraction form
    153,319.40/211,580.42 = 86,251.40/x
  3. Step 3: Cross multiply
    153,319.40x = 211,580.42 × 86,251.40
  4. Step 4: Simplify right side
    153,319.40x = 18,249,107,437.59
  5. Step 5: Solve for x
    x = 18,249,107,437.59/153,319.40
  6. Step 6: Final answer
    x = 119,026.73

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1.5x scale

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.