Home / 127,870.05-191,860.40-68,636.55

Finding the Fourth Proportional to 127,870.05, 191,860.40 and 68,636.55

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Solution

The fourth proportional to 127,870.05, 191,860.40 and 68,636.55 is: 102,984.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,870.05 : 191,860.40 = 68,636.55 : x
  2. Step 2: Convert to fraction form
    127,870.05/191,860.40 = 68,636.55/x
  3. Step 3: Cross multiply
    127,870.05x = 191,860.40 × 68,636.55
  4. Step 4: Simplify right side
    127,870.05x = 13,168,635,937.62
  5. Step 5: Solve for x
    x = 13,168,635,937.62/127,870.05
  6. Step 6: Final answer
    x = 102,984.52

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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.