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Finding the Fourth Proportional to 111,486.21, 153,851.07 and 63,740.55

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Solution

The fourth proportional to 111,486.21, 153,851.07 and 63,740.55 is: 87,962.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,486.21 : 153,851.07 = 63,740.55 : x
  2. Step 2: Convert to fraction form
    111,486.21/153,851.07 = 63,740.55/x
  3. Step 3: Cross multiply
    111,486.21x = 153,851.07 × 63,740.55
  4. Step 4: Simplify right side
    111,486.21x = 9,806,552,124.84
  5. Step 5: Solve for x
    x = 9,806,552,124.84/111,486.21
  6. Step 6: Final answer
    x = 87,962.02

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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.