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Finding the Fourth Proportional to 211,159.76, 316,785.76 and 70,914.72

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Solution

The fourth proportional to 211,159.76, 316,785.76 and 70,914.72 is: 106,387.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,159.76 : 316,785.76 = 70,914.72 : x
  2. Step 2: Convert to fraction form
    211,159.76/316,785.76 = 70,914.72/x
  3. Step 3: Cross multiply
    211,159.76x = 316,785.76 × 70,914.72
  4. Step 4: Simplify right side
    211,159.76x = 22,464,773,470.39
  5. Step 5: Solve for x
    x = 22,464,773,470.39/211,159.76
  6. Step 6: Final answer
    x = 106,387.57

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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.