Home / 120,509.12-180,722.08-49,411.60

Finding the Fourth Proportional to 120,509.12, 180,722.08 and 49,411.60

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Solution

The fourth proportional to 120,509.12, 180,722.08 and 49,411.60 is: 74,100.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,509.12 : 180,722.08 = 49,411.60 : x
  2. Step 2: Convert to fraction form
    120,509.12/180,722.08 = 49,411.60/x
  3. Step 3: Cross multiply
    120,509.12x = 180,722.08 × 49,411.60
  4. Step 4: Simplify right side
    120,509.12x = 8,929,767,128.13
  5. Step 5: Solve for x
    x = 8,929,767,128.13/120,509.12
  6. Step 6: Final answer
    x = 74,100.34

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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.