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Finding the Fourth Proportional to 287,096.90, 430,737.15 and 87,455.30

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Solution

The fourth proportional to 287,096.90, 430,737.15 and 87,455.30 is: 131,210.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,096.90 : 430,737.15 = 87,455.30 : x
  2. Step 2: Convert to fraction form
    287,096.90/430,737.15 = 87,455.30/x
  3. Step 3: Cross multiply
    287,096.90x = 430,737.15 × 87,455.30
  4. Step 4: Simplify right side
    287,096.90x = 37,670,246,674.40
  5. Step 5: Solve for x
    x = 37,670,246,674.40/287,096.90
  6. Step 6: Final answer
    x = 131,210.91

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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.