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Finding the Fourth Proportional to 111,468.78, 153,824.82 and 63,070.20

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Solution

The fourth proportional to 111,468.78, 153,824.82 and 63,070.20 is: 87,035.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,468.78 : 153,824.82 = 63,070.20 : x
  2. Step 2: Convert to fraction form
    111,468.78/153,824.82 = 63,070.20/x
  3. Step 3: Cross multiply
    111,468.78x = 153,824.82 × 63,070.20
  4. Step 4: Simplify right side
    111,468.78x = 9,701,762,162.36
  5. Step 5: Solve for x
    x = 9,701,762,162.36/111,468.78
  6. Step 6: Final answer
    x = 87,035.69

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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.