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Finding the Fourth Proportional to 74,308.60, 111,462.90 and 48,939.40

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Solution

The fourth proportional to 74,308.60, 111,462.90 and 48,939.40 is: 73,409.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,308.60 : 111,462.90 = 48,939.40 : x
  2. Step 2: Convert to fraction form
    74,308.60/111,462.90 = 48,939.40/x
  3. Step 3: Cross multiply
    74,308.60x = 111,462.90 × 48,939.40
  4. Step 4: Simplify right side
    74,308.60x = 5,454,927,448.26
  5. Step 5: Solve for x
    x = 5,454,927,448.26/74,308.60
  6. Step 6: Final answer
    x = 73,409.10

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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.