Home / 120,649.20-180,886.32-81,108.24

Finding the Fourth Proportional to 120,649.20, 180,886.32 and 81,108.24

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Solution

The fourth proportional to 120,649.20, 180,886.32 and 81,108.24 is: 121,603.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,649.20 : 180,886.32 = 81,108.24 : x
  2. Step 2: Convert to fraction form
    120,649.20/180,886.32 = 81,108.24/x
  3. Step 3: Cross multiply
    120,649.20x = 180,886.32 × 81,108.24
  4. Step 4: Simplify right side
    120,649.20x = 14,671,371,055.28
  5. Step 5: Solve for x
    x = 14,671,371,055.28/120,649.20
  6. Step 6: Final answer
    x = 121,603.55

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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.