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Finding the Fourth Proportional to 128,506.44, 177,352.14 and 74,060.52

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Solution

The fourth proportional to 128,506.44, 177,352.14 and 74,060.52 is: 102,211.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,506.44 : 177,352.14 = 74,060.52 : x
  2. Step 2: Convert to fraction form
    128,506.44/177,352.14 = 74,060.52/x
  3. Step 3: Cross multiply
    128,506.44x = 177,352.14 × 74,060.52
  4. Step 4: Simplify right side
    128,506.44x = 13,134,791,711.51
  5. Step 5: Solve for x
    x = 13,134,791,711.51/128,506.44
  6. Step 6: Final answer
    x = 102,211.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.