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Finding the Fourth Proportional to 218,967.59, 328,434.98 and 61,208.34

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Solution

The fourth proportional to 218,967.59, 328,434.98 and 61,208.34 is: 91,807.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,967.59 : 328,434.98 = 61,208.34 : x
  2. Step 2: Convert to fraction form
    218,967.59/328,434.98 = 61,208.34/x
  3. Step 3: Cross multiply
    218,967.59x = 328,434.98 × 61,208.34
  4. Step 4: Simplify right side
    218,967.59x = 20,102,959,617.69
  5. Step 5: Solve for x
    x = 20,102,959,617.69/218,967.59
  6. Step 6: Final answer
    x = 91,807.92

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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.