Home / 120,072.48-180,108.72-31,325.76

Finding the Fourth Proportional to 120,072.48, 180,108.72 and 31,325.76

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Solution

The fourth proportional to 120,072.48, 180,108.72 and 31,325.76 is: 46,988.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,072.48 : 180,108.72 = 31,325.76 : x
  2. Step 2: Convert to fraction form
    120,072.48/180,108.72 = 31,325.76/x
  3. Step 3: Cross multiply
    120,072.48x = 180,108.72 × 31,325.76
  4. Step 4: Simplify right side
    120,072.48x = 5,642,042,536.63
  5. Step 5: Solve for x
    x = 5,642,042,536.63/120,072.48
  6. Step 6: Final answer
    x = 46,988.64

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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.