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Finding the Fourth Proportional to 211,002.95, 316,532.21 and 68,798.28

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Solution

The fourth proportional to 211,002.95, 316,532.21 and 68,798.28 is: 103,206.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,002.95 : 316,532.21 = 68,798.28 : x
  2. Step 2: Convert to fraction form
    211,002.95/316,532.21 = 68,798.28/x
  3. Step 3: Cross multiply
    211,002.95x = 316,532.21 × 68,798.28
  4. Step 4: Simplify right side
    211,002.95x = 21,776,871,268.61
  5. Step 5: Solve for x
    x = 21,776,871,268.61/211,002.95
  6. Step 6: Final answer
    x = 103,206.48

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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.