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Finding the Fourth Proportional to 71,186.20, 106,779.30 and 61,970.20

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Solution

The fourth proportional to 71,186.20, 106,779.30 and 61,970.20 is: 92,955.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,186.20 : 106,779.30 = 61,970.20 : x
  2. Step 2: Convert to fraction form
    71,186.20/106,779.30 = 61,970.20/x
  3. Step 3: Cross multiply
    71,186.20x = 106,779.30 × 61,970.20
  4. Step 4: Simplify right side
    71,186.20x = 6,617,134,576.86
  5. Step 5: Solve for x
    x = 6,617,134,576.86/71,186.20
  6. Step 6: Final answer
    x = 92,955.30

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1.5x scale

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.