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Finding the Fourth Proportional to 133,051.90, 199,577.85 and 85,812.70

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Solution

The fourth proportional to 133,051.90, 199,577.85 and 85,812.70 is: 128,719.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,051.90 : 199,577.85 = 85,812.70 : x
  2. Step 2: Convert to fraction form
    133,051.90/199,577.85 = 85,812.70/x
  3. Step 3: Cross multiply
    133,051.90x = 199,577.85 × 85,812.70
  4. Step 4: Simplify right side
    133,051.90x = 17,126,314,168.70
  5. Step 5: Solve for x
    x = 17,126,314,168.70/133,051.90
  6. Step 6: Final answer
    x = 128,719.05

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1.5x scale

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.