Home / 120,648.61-180,878.28-76,181.94

Finding the Fourth Proportional to 120,648.61, 180,878.28 and 76,181.94

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Solution

The fourth proportional to 120,648.61, 180,878.28 and 76,181.94 is: 114,213.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,648.61 : 180,878.28 = 76,181.94 : x
  2. Step 2: Convert to fraction form
    120,648.61/180,878.28 = 76,181.94/x
  3. Step 3: Cross multiply
    120,648.61x = 180,878.28 × 76,181.94
  4. Step 4: Simplify right side
    120,648.61x = 13,779,658,274.26
  5. Step 5: Solve for x
    x = 13,779,658,274.26/120,648.61
  6. Step 6: Final answer
    x = 114,213.15

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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.