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Finding the Fourth Proportional to 153,100.50, 211,279.77 and 86,032.50

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Solution

The fourth proportional to 153,100.50, 211,279.77 and 86,032.50 is: 118,725.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,100.50 : 211,279.77 = 86,032.50 : x
  2. Step 2: Convert to fraction form
    153,100.50/211,279.77 = 86,032.50/x
  3. Step 3: Cross multiply
    153,100.50x = 211,279.77 × 86,032.50
  4. Step 4: Simplify right side
    153,100.50x = 18,176,926,812.53
  5. Step 5: Solve for x
    x = 18,176,926,812.53/153,100.50
  6. Step 6: Final answer
    x = 118,725.46

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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.