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Finding the Fourth Proportional to 61,312.80, 91,969.20 and 31,739.70

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Solution

The fourth proportional to 61,312.80, 91,969.20 and 31,739.70 is: 47,609.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,312.80 : 91,969.20 = 31,739.70 : x
  2. Step 2: Convert to fraction form
    61,312.80/91,969.20 = 31,739.70/x
  3. Step 3: Cross multiply
    61,312.80x = 91,969.20 × 31,739.70
  4. Step 4: Simplify right side
    61,312.80x = 2,919,074,817.24
  5. Step 5: Solve for x
    x = 2,919,074,817.24/61,312.80
  6. Step 6: Final answer
    x = 47,609.55

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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.