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Finding the Fourth Proportional to 287,699.72, 431,533.85 and 88,020.09

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Solution

The fourth proportional to 287,699.72, 431,533.85 and 88,020.09 is: 132,025.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,699.72 : 431,533.85 = 88,020.09 : x
  2. Step 2: Convert to fraction form
    287,699.72/431,533.85 = 88,020.09/x
  3. Step 3: Cross multiply
    287,699.72x = 431,533.85 × 88,020.09
  4. Step 4: Simplify right side
    287,699.72x = 37,983,648,315.05
  5. Step 5: Solve for x
    x = 37,983,648,315.05/287,699.72
  6. Step 6: Final answer
    x = 132,025.32

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1.5x scale

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.