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Finding the Fourth Proportional to 145,729.76, 218,505.59 and 69,851.52

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Solution

The fourth proportional to 145,729.76, 218,505.59 and 69,851.52 is: 104,734.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,729.76 : 218,505.59 = 69,851.52 : x
  2. Step 2: Convert to fraction form
    145,729.76/218,505.59 = 69,851.52/x
  3. Step 3: Cross multiply
    145,729.76x = 218,505.59 × 69,851.52
  4. Step 4: Simplify right side
    145,729.76x = 15,262,947,764.63
  5. Step 5: Solve for x
    x = 15,262,947,764.63/145,729.76
  6. Step 6: Final answer
    x = 104,734.60

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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.