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Finding the Fourth Proportional to 152,956.61, 211,079.92 and 84,979.85

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Solution

The fourth proportional to 152,956.61, 211,079.92 and 84,979.85 is: 117,272.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,956.61 : 211,079.92 = 84,979.85 : x
  2. Step 2: Convert to fraction form
    152,956.61/211,079.92 = 84,979.85/x
  3. Step 3: Cross multiply
    152,956.61x = 211,079.92 × 84,979.85
  4. Step 4: Simplify right side
    152,956.61x = 17,937,540,254.86
  5. Step 5: Solve for x
    x = 17,937,540,254.86/152,956.61
  6. Step 6: Final answer
    x = 117,272.09

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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.