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Finding the Fourth Proportional to 390,155.56, 585,233.33 and 109,672.81

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Solution

The fourth proportional to 390,155.56, 585,233.33 and 109,672.81 is: 164,509.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,155.56 : 585,233.33 = 109,672.81 : x
  2. Step 2: Convert to fraction form
    390,155.56/585,233.33 = 109,672.81/x
  3. Step 3: Cross multiply
    390,155.56x = 585,233.33 × 109,672.81
  4. Step 4: Simplify right side
    390,155.56x = 64,184,181,795.31
  5. Step 5: Solve for x
    x = 64,184,181,795.31/390,155.56
  6. Step 6: Final answer
    x = 164,509.21

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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.