Home / 137,839.98-190,223.76-77,421.28

Finding the Fourth Proportional to 137,839.98, 190,223.76 and 77,421.28

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Solution

The fourth proportional to 137,839.98, 190,223.76 and 77,421.28 is: 106,843.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,839.98 : 190,223.76 = 77,421.28 : x
  2. Step 2: Convert to fraction form
    137,839.98/190,223.76 = 77,421.28/x
  3. Step 3: Cross multiply
    137,839.98x = 190,223.76 × 77,421.28
  4. Step 4: Simplify right side
    137,839.98x = 14,727,366,985.61
  5. Step 5: Solve for x
    x = 14,727,366,985.61/137,839.98
  6. Step 6: Final answer
    x = 106,843.94

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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.