Home / 135,420.55-186,878.03-74,989.89

Finding the Fourth Proportional to 135,420.55, 186,878.03 and 74,989.89

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Solution

The fourth proportional to 135,420.55, 186,878.03 and 74,989.89 is: 103,484.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,420.55 : 186,878.03 = 74,989.89 : x
  2. Step 2: Convert to fraction form
    135,420.55/186,878.03 = 74,989.89/x
  3. Step 3: Cross multiply
    135,420.55x = 186,878.03 × 74,989.89
  4. Step 4: Simplify right side
    135,420.55x = 14,013,962,538.17
  5. Step 5: Solve for x
    x = 14,013,962,538.17/135,420.55
  6. Step 6: Final answer
    x = 103,484.76

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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.