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Finding the Fourth Proportional to 78,477.23, 108,339.91 and 62,995.30

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Solution

The fourth proportional to 78,477.23, 108,339.91 and 62,995.30 is: 86,966.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,477.23 : 108,339.91 = 62,995.30 : x
  2. Step 2: Convert to fraction form
    78,477.23/108,339.91 = 62,995.30/x
  3. Step 3: Cross multiply
    78,477.23x = 108,339.91 × 62,995.30
  4. Step 4: Simplify right side
    78,477.23x = 6,824,904,704.08
  5. Step 5: Solve for x
    x = 6,824,904,704.08/78,477.23
  6. Step 6: Final answer
    x = 86,966.68

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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.