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Finding the Fourth Proportional to 218,752.44, 328,130.28 and 78,512.28

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Solution

The fourth proportional to 218,752.44, 328,130.28 and 78,512.28 is: 117,769.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,752.44 : 328,130.28 = 78,512.28 : x
  2. Step 2: Convert to fraction form
    218,752.44/328,130.28 = 78,512.28/x
  3. Step 3: Cross multiply
    218,752.44x = 328,130.28 × 78,512.28
  4. Step 4: Simplify right side
    218,752.44x = 25,762,256,419.84
  5. Step 5: Solve for x
    x = 25,762,256,419.84/218,752.44
  6. Step 6: Final answer
    x = 117,769.00

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1.5x scale

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.