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Finding the Fourth Proportional to 74,603.60, 111,966.60 and 74,020.40

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Solution

The fourth proportional to 74,603.60, 111,966.60 and 74,020.40 is: 111,091.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,603.60 : 111,966.60 = 74,020.40 : x
  2. Step 2: Convert to fraction form
    74,603.60/111,966.60 = 74,020.40/x
  3. Step 3: Cross multiply
    74,603.60x = 111,966.60 × 74,020.40
  4. Step 4: Simplify right side
    74,603.60x = 8,287,812,518.64
  5. Step 5: Solve for x
    x = 8,287,812,518.64/74,603.60
  6. Step 6: Final answer
    x = 111,091.32

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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.