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Finding the Fourth Proportional to 70,985.80, 106,478.70 and 53,271.10

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Solution

The fourth proportional to 70,985.80, 106,478.70 and 53,271.10 is: 79,906.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,985.80 : 106,478.70 = 53,271.10 : x
  2. Step 2: Convert to fraction form
    70,985.80/106,478.70 = 53,271.10/x
  3. Step 3: Cross multiply
    70,985.80x = 106,478.70 × 53,271.10
  4. Step 4: Simplify right side
    70,985.80x = 5,672,237,475.57
  5. Step 5: Solve for x
    x = 5,672,237,475.57/70,985.80
  6. Step 6: Final answer
    x = 79,906.65

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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.