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Finding the Fourth Proportional to 86,644.80, 129,902.40 and 47,246.40

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Solution

The fourth proportional to 86,644.80, 129,902.40 and 47,246.40 is: 70,834.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,644.80 : 129,902.40 = 47,246.40 : x
  2. Step 2: Convert to fraction form
    86,644.80/129,902.40 = 47,246.40/x
  3. Step 3: Cross multiply
    86,644.80x = 129,902.40 × 47,246.40
  4. Step 4: Simplify right side
    86,644.80x = 6,137,420,751.36
  5. Step 5: Solve for x
    x = 6,137,420,751.36/86,644.80
  6. Step 6: Final answer
    x = 70,834.27

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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.