Home / 287,108.39-430,724.86-87,423.55

Finding the Fourth Proportional to 287,108.39, 430,724.86 and 87,423.55

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Solution

The fourth proportional to 287,108.39, 430,724.86 and 87,423.55 is: 131,154.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,108.39 : 430,724.86 = 87,423.55 : x
  2. Step 2: Convert to fraction form
    287,108.39/430,724.86 = 87,423.55/x
  3. Step 3: Cross multiply
    287,108.39x = 430,724.86 × 87,423.55
  4. Step 4: Simplify right side
    287,108.39x = 37,655,493,743.71
  5. Step 5: Solve for x
    x = 37,655,493,743.71/287,108.39
  6. Step 6: Final answer
    x = 131,154.28

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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.