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Finding the Fourth Proportional to 71,470.45, 98,622.25 and 39,638.67

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Solution

The fourth proportional to 71,470.45, 98,622.25 and 39,638.67 is: 54,697.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,470.45 : 98,622.25 = 39,638.67 : x
  2. Step 2: Convert to fraction form
    71,470.45/98,622.25 = 39,638.67/x
  3. Step 3: Cross multiply
    71,470.45x = 98,622.25 × 39,638.67
  4. Step 4: Simplify right side
    71,470.45x = 3,909,254,822.41
  5. Step 5: Solve for x
    x = 3,909,254,822.41/71,470.45
  6. Step 6: Final answer
    x = 54,697.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.