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Finding the Fourth Proportional to 133,130.70, 183,616.20 and 85,388.40

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Solution

The fourth proportional to 133,130.70, 183,616.20 and 85,388.40 is: 117,769.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,130.70 : 183,616.20 = 85,388.40 : x
  2. Step 2: Convert to fraction form
    133,130.70/183,616.20 = 85,388.40/x
  3. Step 3: Cross multiply
    133,130.70x = 183,616.20 × 85,388.40
  4. Step 4: Simplify right side
    133,130.70x = 15,678,693,532.08
  5. Step 5: Solve for x
    x = 15,678,693,532.08/133,130.70
  6. Step 6: Final answer
    x = 117,769.18

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1.5x scale

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.