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Finding the Fourth Proportional to 153,330.68, 211,591.62 and 85,345.90

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Solution

The fourth proportional to 153,330.68, 211,591.62 and 85,345.90 is: 117,774.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,330.68 : 211,591.62 = 85,345.90 : x
  2. Step 2: Convert to fraction form
    153,330.68/211,591.62 = 85,345.90/x
  3. Step 3: Cross multiply
    153,330.68x = 211,591.62 × 85,345.90
  4. Step 4: Simplify right side
    153,330.68x = 18,058,478,022.60
  5. Step 5: Solve for x
    x = 18,058,478,022.60/153,330.68
  6. Step 6: Final answer
    x = 117,774.72

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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.