Home / 120,285.75-180,429.36-31,538.46

Finding the Fourth Proportional to 120,285.75, 180,429.36 and 31,538.46

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Solution

The fourth proportional to 120,285.75, 180,429.36 and 31,538.46 is: 47,307.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,285.75 : 180,429.36 = 31,538.46 : x
  2. Step 2: Convert to fraction form
    120,285.75/180,429.36 = 31,538.46/x
  3. Step 3: Cross multiply
    120,285.75x = 180,429.36 × 31,538.46
  4. Step 4: Simplify right side
    120,285.75x = 5,690,464,153.19
  5. Step 5: Solve for x
    x = 5,690,464,153.19/120,285.75
  6. Step 6: Final answer
    x = 47,307.88

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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.