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Finding the Fourth Proportional to 211,332.66, 316,923.66 and 69,143.64

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Solution

The fourth proportional to 211,332.66, 316,923.66 and 69,143.64 is: 103,690.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,332.66 : 316,923.66 = 69,143.64 : x
  2. Step 2: Convert to fraction form
    211,332.66/316,923.66 = 69,143.64/x
  3. Step 3: Cross multiply
    211,332.66x = 316,923.66 × 69,143.64
  4. Step 4: Simplify right side
    211,332.66x = 21,913,255,454.52
  5. Step 5: Solve for x
    x = 21,913,255,454.52/211,332.66
  6. Step 6: Final answer
    x = 103,690.81

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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.