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Finding the Fourth Proportional to 111,642.21, 154,068 and 60,655.95

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Solution

The fourth proportional to 111,642.21, 154,068 and 60,655.95 is: 83,706.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,642.21 : 154,068 = 60,655.95 : x
  2. Step 2: Convert to fraction form
    111,642.21/154,068 = 60,655.95/x
  3. Step 3: Cross multiply
    111,642.21x = 154,068 × 60,655.95
  4. Step 4: Simplify right side
    111,642.21x = 9,345,140,904.60
  5. Step 5: Solve for x
    x = 9,345,140,904.60/111,642.21
  6. Step 6: Final answer
    x = 83,706.16

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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.