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Finding the Fourth Proportional to 133,686.90, 200,465.55 and 74,459.70

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Solution

The fourth proportional to 133,686.90, 200,465.55 and 74,459.70 is: 111,653.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,686.90 : 200,465.55 = 74,459.70 : x
  2. Step 2: Convert to fraction form
    133,686.90/200,465.55 = 74,459.70/x
  3. Step 3: Cross multiply
    133,686.90x = 200,465.55 × 74,459.70
  4. Step 4: Simplify right side
    133,686.90x = 14,926,604,713.34
  5. Step 5: Solve for x
    x = 14,926,604,713.34/133,686.90
  6. Step 6: Final answer
    x = 111,653.46

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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.