Home / 287,078.13-430,709.40-87,437.16

Finding the Fourth Proportional to 287,078.13, 430,709.40 and 87,437.16

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Solution

The fourth proportional to 287,078.13, 430,709.40 and 87,437.16 is: 131,183.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,078.13 : 430,709.40 = 87,437.16 : x
  2. Step 2: Convert to fraction form
    287,078.13/430,709.40 = 87,437.16/x
  3. Step 3: Cross multiply
    287,078.13x = 430,709.40 × 87,437.16
  4. Step 4: Simplify right side
    287,078.13x = 37,660,006,721.30
  5. Step 5: Solve for x
    x = 37,660,006,721.30/287,078.13
  6. Step 6: Final answer
    x = 131,183.82

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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.