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Finding the Fourth Proportional to 86,573.70, 129,866.31 and 30,406.98

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Solution

The fourth proportional to 86,573.70, 129,866.31 and 30,406.98 is: 45,612.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,573.70 : 129,866.31 = 30,406.98 : x
  2. Step 2: Convert to fraction form
    86,573.70/129,866.31 = 30,406.98/x
  3. Step 3: Cross multiply
    86,573.70x = 129,866.31 × 30,406.98
  4. Step 4: Simplify right side
    86,573.70x = 3,948,842,290.84
  5. Step 5: Solve for x
    x = 3,948,842,290.84/86,573.70
  6. Step 6: Final answer
    x = 45,612.49

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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.