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Finding the Fourth Proportional to 74,310.40, 111,465.60 and 70,854.40

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Solution

The fourth proportional to 74,310.40, 111,465.60 and 70,854.40 is: 106,281.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,310.40 : 111,465.60 = 70,854.40 : x
  2. Step 2: Convert to fraction form
    74,310.40/111,465.60 = 70,854.40/x
  3. Step 3: Cross multiply
    74,310.40x = 111,465.60 × 70,854.40
  4. Step 4: Simplify right side
    74,310.40x = 7,897,828,208.64
  5. Step 5: Solve for x
    x = 7,897,828,208.64/74,310.40
  6. Step 6: Final answer
    x = 106,281.60

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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.