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Finding the Fourth Proportional to 112,122.28, 154,728.12 and 61,821.28

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Solution

The fourth proportional to 112,122.28, 154,728.12 and 61,821.28 is: 85,313.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,122.28 : 154,728.12 = 61,821.28 : x
  2. Step 2: Convert to fraction form
    112,122.28/154,728.12 = 61,821.28/x
  3. Step 3: Cross multiply
    112,122.28x = 154,728.12 × 61,821.28
  4. Step 4: Simplify right side
    112,122.28x = 9,565,490,430.39
  5. Step 5: Solve for x
    x = 9,565,490,430.39/112,122.28
  6. Step 6: Final answer
    x = 85,313.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.