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Finding the Fourth Proportional to 218,881.60, 328,322.40 and 61,109.80

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Solution

The fourth proportional to 218,881.60, 328,322.40 and 61,109.80 is: 91,664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,881.60 : 328,322.40 = 61,109.80 : x
  2. Step 2: Convert to fraction form
    218,881.60/328,322.40 = 61,109.80/x
  3. Step 3: Cross multiply
    218,881.60x = 328,322.40 × 61,109.80
  4. Step 4: Simplify right side
    218,881.60x = 20,063,716,199.52
  5. Step 5: Solve for x
    x = 20,063,716,199.52/218,881.60
  6. Step 6: Final answer
    x = 91,664.70

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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.