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Finding the Fourth Proportional to 158,315.02, 218,468.14 and 86,693.80

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Solution

The fourth proportional to 158,315.02, 218,468.14 and 86,693.80 is: 119,633.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,315.02 : 218,468.14 = 86,693.80 : x
  2. Step 2: Convert to fraction form
    158,315.02/218,468.14 = 86,693.80/x
  3. Step 3: Cross multiply
    158,315.02x = 218,468.14 × 86,693.80
  4. Step 4: Simplify right side
    158,315.02x = 18,939,833,235.53
  5. Step 5: Solve for x
    x = 18,939,833,235.53/158,315.02
  6. Step 6: Final answer
    x = 119,633.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.