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Finding the Fourth Proportional to 153,308.75, 211,569.32 and 86,240.75

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Solution

The fourth proportional to 153,308.75, 211,569.32 and 86,240.75 is: 119,014.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,308.75 : 211,569.32 = 86,240.75 : x
  2. Step 2: Convert to fraction form
    153,308.75/211,569.32 = 86,240.75/x
  3. Step 3: Cross multiply
    153,308.75x = 211,569.32 × 86,240.75
  4. Step 4: Simplify right side
    153,308.75x = 18,245,896,402.59
  5. Step 5: Solve for x
    x = 18,245,896,402.59/153,308.75
  6. Step 6: Final answer
    x = 119,014.06

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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.