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Finding the Fourth Proportional to 70,920.50, 106,447.91 and 52,143.35

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Solution

The fourth proportional to 70,920.50, 106,447.91 and 52,143.35 is: 78,264.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,920.50 : 106,447.91 = 52,143.35 : x
  2. Step 2: Convert to fraction form
    70,920.50/106,447.91 = 52,143.35/x
  3. Step 3: Cross multiply
    70,920.50x = 106,447.91 × 52,143.35
  4. Step 4: Simplify right side
    70,920.50x = 5,550,549,834.94
  5. Step 5: Solve for x
    x = 5,550,549,834.94/70,920.50
  6. Step 6: Final answer
    x = 78,264.40

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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.