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Finding the Fourth Proportional to 86,574.96, 129,905.64 and 39,860.64

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Solution

The fourth proportional to 86,574.96, 129,905.64 and 39,860.64 is: 59,810.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,574.96 : 129,905.64 = 39,860.64 : x
  2. Step 2: Convert to fraction form
    86,574.96/129,905.64 = 39,860.64/x
  3. Step 3: Cross multiply
    86,574.96x = 129,905.64 × 39,860.64
  4. Step 4: Simplify right side
    86,574.96x = 5,178,121,950.01
  5. Step 5: Solve for x
    x = 5,178,121,950.01/86,574.96
  6. Step 6: Final answer
    x = 59,810.85

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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.