Home / 120,155.04-180,236.16-31,407.12

Finding the Fourth Proportional to 120,155.04, 180,236.16 and 31,407.12

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Solution

The fourth proportional to 120,155.04, 180,236.16 and 31,407.12 is: 47,111.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,155.04 : 180,236.16 = 31,407.12 : x
  2. Step 2: Convert to fraction form
    120,155.04/180,236.16 = 31,407.12/x
  3. Step 3: Cross multiply
    120,155.04x = 180,236.16 × 31,407.12
  4. Step 4: Simplify right side
    120,155.04x = 5,660,698,705.46
  5. Step 5: Solve for x
    x = 5,660,698,705.46/120,155.04
  6. Step 6: Final answer
    x = 47,111.62

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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.