Home / 287,078.39-430,679.86-87,393.60

Finding the Fourth Proportional to 287,078.39, 430,679.86 and 87,393.60

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Solution

The fourth proportional to 287,078.39, 430,679.86 and 87,393.60 is: 131,109.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,078.39 : 430,679.86 = 87,393.60 : x
  2. Step 2: Convert to fraction form
    287,078.39/430,679.86 = 87,393.60/x
  3. Step 3: Cross multiply
    287,078.39x = 430,679.86 × 87,393.60
  4. Step 4: Simplify right side
    287,078.39x = 37,638,663,194.41
  5. Step 5: Solve for x
    x = 37,638,663,194.41/287,078.39
  6. Step 6: Final answer
    x = 131,109.36

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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.