Home / 128,211.40-176,929.14-77,926.60

Finding the Fourth Proportional to 128,211.40, 176,929.14 and 77,926.60

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Solution

The fourth proportional to 128,211.40, 176,929.14 and 77,926.60 is: 107,537.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,211.40 : 176,929.14 = 77,926.60 : x
  2. Step 2: Convert to fraction form
    128,211.40/176,929.14 = 77,926.60/x
  3. Step 3: Cross multiply
    128,211.40x = 176,929.14 × 77,926.60
  4. Step 4: Simplify right side
    128,211.40x = 13,787,486,321.12
  5. Step 5: Solve for x
    x = 13,787,486,321.12/128,211.40
  6. Step 6: Final answer
    x = 107,537.13

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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.