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Finding the Fourth Proportional to 211,373.16, 316,967.58 and 79,953

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Solution

The fourth proportional to 211,373.16, 316,967.58 and 79,953 is: 119,894.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,373.16 : 316,967.58 = 79,953 : x
  2. Step 2: Convert to fraction form
    211,373.16/316,967.58 = 79,953/x
  3. Step 3: Cross multiply
    211,373.16x = 316,967.58 × 79,953
  4. Step 4: Simplify right side
    211,373.16x = 25,342,508,923.74
  5. Step 5: Solve for x
    x = 25,342,508,923.74/211,373.16
  6. Step 6: Final answer
    x = 119,894.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.