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Finding the Fourth Proportional to 287,035.87, 430,575.81 and 87,373.30

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Solution

The fourth proportional to 287,035.87, 430,575.81 and 87,373.30 is: 131,066.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,035.87 : 430,575.81 = 87,373.30 : x
  2. Step 2: Convert to fraction form
    287,035.87/430,575.81 = 87,373.30/x
  3. Step 3: Cross multiply
    287,035.87x = 430,575.81 × 87,373.30
  4. Step 4: Simplify right side
    287,035.87x = 37,620,829,419.87
  5. Step 5: Solve for x
    x = 37,620,829,419.87/287,035.87
  6. Step 6: Final answer
    x = 131,066.65

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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.