Home / 135,123.18-186,462.72-74,690.22

Finding the Fourth Proportional to 135,123.18, 186,462.72 and 74,690.22

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Solution

The fourth proportional to 135,123.18, 186,462.72 and 74,690.22 is: 103,068.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,123.18 : 186,462.72 = 74,690.22 : x
  2. Step 2: Convert to fraction form
    135,123.18/186,462.72 = 74,690.22/x
  3. Step 3: Cross multiply
    135,123.18x = 186,462.72 × 74,690.22
  4. Step 4: Simplify right side
    135,123.18x = 13,926,941,578.60
  5. Step 5: Solve for x
    x = 13,926,941,578.60/135,123.18
  6. Step 6: Final answer
    x = 103,068.49

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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.