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Finding the Fourth Proportional to 120,908.40, 181,362.60 and 64,921.20

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Solution

The fourth proportional to 120,908.40, 181,362.60 and 64,921.20 is: 97,381.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,908.40 : 181,362.60 = 64,921.20 : x
  2. Step 2: Convert to fraction form
    120,908.40/181,362.60 = 64,921.20/x
  3. Step 3: Cross multiply
    120,908.40x = 181,362.60 × 64,921.20
  4. Step 4: Simplify right side
    120,908.40x = 11,774,277,627.12
  5. Step 5: Solve for x
    x = 11,774,277,627.12/120,908.40
  6. Step 6: Final answer
    x = 97,381.80

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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.