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Finding the Fourth Proportional to 120,001.70, 180,002.55 and 86,824.10

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Solution

The fourth proportional to 120,001.70, 180,002.55 and 86,824.10 is: 130,236.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,001.70 : 180,002.55 = 86,824.10 : x
  2. Step 2: Convert to fraction form
    120,001.70/180,002.55 = 86,824.10/x
  3. Step 3: Cross multiply
    120,001.70x = 180,002.55 × 86,824.10
  4. Step 4: Simplify right side
    120,001.70x = 15,628,559,401.46
  5. Step 5: Solve for x
    x = 15,628,559,401.46/120,001.70
  6. Step 6: Final answer
    x = 130,236.15

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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.