Home / 103,206.31-142,426.19-77,318.98

Finding the Fourth Proportional to 103,206.31, 142,426.19 and 77,318.98

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Solution

The fourth proportional to 103,206.31, 142,426.19 and 77,318.98 is: 106,701.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,206.31 : 142,426.19 = 77,318.98 : x
  2. Step 2: Convert to fraction form
    103,206.31/142,426.19 = 77,318.98/x
  3. Step 3: Cross multiply
    103,206.31x = 142,426.19 × 77,318.98
  4. Step 4: Simplify right side
    103,206.31x = 11,012,247,736.09
  5. Step 5: Solve for x
    x = 11,012,247,736.09/103,206.31
  6. Step 6: Final answer
    x = 106,701.30

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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.