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Finding the Fourth Proportional to 117,343.68, 161,891.76 and 77,079.12

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Solution

The fourth proportional to 117,343.68, 161,891.76 and 77,079.12 is: 106,341.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,343.68 : 161,891.76 = 77,079.12 : x
  2. Step 2: Convert to fraction form
    117,343.68/161,891.76 = 77,079.12/x
  3. Step 3: Cross multiply
    117,343.68x = 161,891.76 × 77,079.12
  4. Step 4: Simplify right side
    117,343.68x = 12,478,474,396.05
  5. Step 5: Solve for x
    x = 12,478,474,396.05/117,343.68
  6. Step 6: Final answer
    x = 106,341.26

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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.