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Finding the Fourth Proportional to 153,458.52, 211,769.54 and 85,475.32

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Solution

The fourth proportional to 153,458.52, 211,769.54 and 85,475.32 is: 117,954.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,458.52 : 211,769.54 = 85,475.32 : x
  2. Step 2: Convert to fraction form
    153,458.52/211,769.54 = 85,475.32/x
  3. Step 3: Cross multiply
    153,458.52x = 211,769.54 × 85,475.32
  4. Step 4: Simplify right side
    153,458.52x = 18,101,069,197.75
  5. Step 5: Solve for x
    x = 18,101,069,197.75/153,458.52
  6. Step 6: Final answer
    x = 117,954.15

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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.