Home / 135,975.04-187,658.88-78,616.80

Finding the Fourth Proportional to 135,975.04, 187,658.88 and 78,616.80

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Solution

The fourth proportional to 135,975.04, 187,658.88 and 78,616.80 is: 108,498.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,975.04 : 187,658.88 = 78,616.80 : x
  2. Step 2: Convert to fraction form
    135,975.04/187,658.88 = 78,616.80/x
  3. Step 3: Cross multiply
    135,975.04x = 187,658.88 × 78,616.80
  4. Step 4: Simplify right side
    135,975.04x = 14,753,140,637.18
  5. Step 5: Solve for x
    x = 14,753,140,637.18/135,975.04
  6. Step 6: Final answer
    x = 108,498.89

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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.