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Finding the Fourth Proportional to 70,909.20, 106,363.80 and 65,004.30

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Solution

The fourth proportional to 70,909.20, 106,363.80 and 65,004.30 is: 97,506.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,909.20 : 106,363.80 = 65,004.30 : x
  2. Step 2: Convert to fraction form
    70,909.20/106,363.80 = 65,004.30/x
  3. Step 3: Cross multiply
    70,909.20x = 106,363.80 × 65,004.30
  4. Step 4: Simplify right side
    70,909.20x = 6,914,104,364.34
  5. Step 5: Solve for x
    x = 6,914,104,364.34/70,909.20
  6. Step 6: Final answer
    x = 97,506.45

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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.