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Finding the Fourth Proportional to 131,399, 181,330.60 and 70,969.64

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Solution

The fourth proportional to 131,399, 181,330.60 and 70,969.64 is: 97,938.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,399 : 181,330.60 = 70,969.64 : x
  2. Step 2: Convert to fraction form
    131,399/181,330.60 = 70,969.64/x
  3. Step 3: Cross multiply
    131,399x = 181,330.60 × 70,969.64
  4. Step 4: Simplify right side
    131,399x = 12,868,967,402.98
  5. Step 5: Solve for x
    x = 12,868,967,402.98/131,399
  6. Step 6: Final answer
    x = 97,938.09

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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.