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Finding the Fourth Proportional to 74,829.60, 112,305.60 and 74,246.40

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Solution

The fourth proportional to 74,829.60, 112,305.60 and 74,246.40 is: 111,430.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,829.60 : 112,305.60 = 74,246.40 : x
  2. Step 2: Convert to fraction form
    74,829.60/112,305.60 = 74,246.40/x
  3. Step 3: Cross multiply
    74,829.60x = 112,305.60 × 74,246.40
  4. Step 4: Simplify right side
    74,829.60x = 8,338,286,499.84
  5. Step 5: Solve for x
    x = 8,338,286,499.84/74,829.60
  6. Step 6: Final answer
    x = 111,430.32

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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.