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Finding the Fourth Proportional to 101,739.60, 152,479.80 and 74,005.20

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Solution

The fourth proportional to 101,739.60, 152,479.80 and 74,005.20 is: 110,913.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,739.60 : 152,479.80 = 74,005.20 : x
  2. Step 2: Convert to fraction form
    101,739.60/152,479.80 = 74,005.20/x
  3. Step 3: Cross multiply
    101,739.60x = 152,479.80 × 74,005.20
  4. Step 4: Simplify right side
    101,739.60x = 11,284,298,094.96
  5. Step 5: Solve for x
    x = 11,284,298,094.96/101,739.60
  6. Step 6: Final answer
    x = 110,913.53

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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.