Home / 211,135.32-316,827.72-78,109.02

Finding the Fourth Proportional to 211,135.32, 316,827.72 and 78,109.02

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Solution

The fourth proportional to 211,135.32, 316,827.72 and 78,109.02 is: 117,209.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,135.32 : 316,827.72 = 78,109.02 : x
  2. Step 2: Convert to fraction form
    211,135.32/316,827.72 = 78,109.02/x
  3. Step 3: Cross multiply
    211,135.32x = 316,827.72 × 78,109.02
  4. Step 4: Simplify right side
    211,135.32x = 24,747,102,718.03
  5. Step 5: Solve for x
    x = 24,747,102,718.03/211,135.32
  6. Step 6: Final answer
    x = 117,209.68

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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.