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Finding the Fourth Proportional to 78,937.01, 108,929.84 and 43,128.26

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Solution

The fourth proportional to 78,937.01, 108,929.84 and 43,128.26 is: 59,515.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,937.01 : 108,929.84 = 43,128.26 : x
  2. Step 2: Convert to fraction form
    78,937.01/108,929.84 = 43,128.26/x
  3. Step 3: Cross multiply
    78,937.01x = 108,929.84 × 43,128.26
  4. Step 4: Simplify right side
    78,937.01x = 4,697,953,700.99
  5. Step 5: Solve for x
    x = 4,697,953,700.99/78,937.01
  6. Step 6: Final answer
    x = 59,515.23

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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.