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Finding the Fourth Proportional to 190,885.68, 286,202.16 and 91,061.28

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Solution

The fourth proportional to 190,885.68, 286,202.16 and 91,061.28 is: 136,531.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,885.68 : 286,202.16 = 91,061.28 : x
  2. Step 2: Convert to fraction form
    190,885.68/286,202.16 = 91,061.28/x
  3. Step 3: Cross multiply
    190,885.68x = 286,202.16 × 91,061.28
  4. Step 4: Simplify right side
    190,885.68x = 26,061,935,028.36
  5. Step 5: Solve for x
    x = 26,061,935,028.36/190,885.68
  6. Step 6: Final answer
    x = 136,531.64

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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.