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Finding the Fourth Proportional to 153,373.28, 211,654.65 and 85,388.50

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Solution

The fourth proportional to 153,373.28, 211,654.65 and 85,388.50 is: 117,835.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,373.28 : 211,654.65 = 85,388.50 : x
  2. Step 2: Convert to fraction form
    153,373.28/211,654.65 = 85,388.50/x
  3. Step 3: Cross multiply
    153,373.28x = 211,654.65 × 85,388.50
  4. Step 4: Simplify right side
    153,373.28x = 18,072,872,475.74
  5. Step 5: Solve for x
    x = 18,072,872,475.74/153,373.28
  6. Step 6: Final answer
    x = 117,835.86

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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.