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Finding the Fourth Proportional to 111,520.32, 153,900.16 and 61,219.84

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Solution

The fourth proportional to 111,520.32, 153,900.16 and 61,219.84 is: 84,484.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,520.32 : 153,900.16 = 61,219.84 : x
  2. Step 2: Convert to fraction form
    111,520.32/153,900.16 = 61,219.84/x
  3. Step 3: Cross multiply
    111,520.32x = 153,900.16 × 61,219.84
  4. Step 4: Simplify right side
    111,520.32x = 9,421,743,171.17
  5. Step 5: Solve for x
    x = 9,421,743,171.17/111,520.32
  6. Step 6: Final answer
    x = 84,484.54

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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.