Home / 151,915.02-209,636.34-87,379.35

Finding the Fourth Proportional to 151,915.02, 209,636.34 and 87,379.35

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Solution

The fourth proportional to 151,915.02, 209,636.34 and 87,379.35 is: 120,579.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,915.02 : 209,636.34 = 87,379.35 : x
  2. Step 2: Convert to fraction form
    151,915.02/209,636.34 = 87,379.35/x
  3. Step 3: Cross multiply
    151,915.02x = 209,636.34 × 87,379.35
  4. Step 4: Simplify right side
    151,915.02x = 18,317,887,125.58
  5. Step 5: Solve for x
    x = 18,317,887,125.58/151,915.02
  6. Step 6: Final answer
    x = 120,579.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.