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Finding the Fourth Proportional to 51,926.40, 77,860.80 and 20,726.40

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Solution

The fourth proportional to 51,926.40, 77,860.80 and 20,726.40 is: 31,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,926.40 : 77,860.80 = 20,726.40 : x
  2. Step 2: Convert to fraction form
    51,926.40/77,860.80 = 20,726.40/x
  3. Step 3: Cross multiply
    51,926.40x = 77,860.80 × 20,726.40
  4. Step 4: Simplify right side
    51,926.40x = 1,613,774,085.12
  5. Step 5: Solve for x
    x = 1,613,774,085.12/51,926.40
  6. Step 6: Final answer
    x = 31,078.10

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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.