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Finding the Fourth Proportional to 111,515.48, 153,886.74 and 61,215.56

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Solution

The fourth proportional to 111,515.48, 153,886.74 and 61,215.56 is: 84,474.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,515.48 : 153,886.74 = 61,215.56 : x
  2. Step 2: Convert to fraction form
    111,515.48/153,886.74 = 61,215.56/x
  3. Step 3: Cross multiply
    111,515.48x = 153,886.74 × 61,215.56
  4. Step 4: Simplify right side
    111,515.48x = 9,420,262,965.67
  5. Step 5: Solve for x
    x = 9,420,262,965.67/111,515.48
  6. Step 6: Final answer
    x = 84,474.94

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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.