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Finding the Fourth Proportional to 70,920.90, 106,290.90 and 37,656.90

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Solution

The fourth proportional to 70,920.90, 106,290.90 and 37,656.90 is: 56,437.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,920.90 : 106,290.90 = 37,656.90 : x
  2. Step 2: Convert to fraction form
    70,920.90/106,290.90 = 37,656.90/x
  3. Step 3: Cross multiply
    70,920.90x = 106,290.90 × 37,656.90
  4. Step 4: Simplify right side
    70,920.90x = 4,002,585,792.21
  5. Step 5: Solve for x
    x = 4,002,585,792.21/70,920.90
  6. Step 6: Final answer
    x = 56,437.32

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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.