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Finding the Fourth Proportional to 357,022.72, 535,527.36 and 87,155.20

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Solution

The fourth proportional to 357,022.72, 535,527.36 and 87,155.20 is: 130,731.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,022.72 : 535,527.36 = 87,155.20 : x
  2. Step 2: Convert to fraction form
    357,022.72/535,527.36 = 87,155.20/x
  3. Step 3: Cross multiply
    357,022.72x = 535,527.36 × 87,155.20
  4. Step 4: Simplify right side
    357,022.72x = 46,673,994,166.27
  5. Step 5: Solve for x
    x = 46,673,994,166.27/357,022.72
  6. Step 6: Final answer
    x = 130,731.16

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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.