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Finding the Fourth Proportional to 153,479.32, 211,773.36 and 85,494.61

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Solution

The fourth proportional to 153,479.32, 211,773.36 and 85,494.61 is: 117,966.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,479.32 : 211,773.36 = 85,494.61 : x
  2. Step 2: Convert to fraction form
    153,479.32/211,773.36 = 85,494.61/x
  3. Step 3: Cross multiply
    153,479.32x = 211,773.36 × 85,494.61
  4. Step 4: Simplify right side
    153,479.32x = 18,105,480,821.59
  5. Step 5: Solve for x
    x = 18,105,480,821.59/153,479.32
  6. Step 6: Final answer
    x = 117,966.91

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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.