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Finding the Fourth Proportional to 78,897.47, 108,873.72 and 43,080.21

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Solution

The fourth proportional to 78,897.47, 108,873.72 and 43,080.21 is: 59,448.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,897.47 : 108,873.72 = 43,080.21 : x
  2. Step 2: Convert to fraction form
    78,897.47/108,873.72 = 43,080.21/x
  3. Step 3: Cross multiply
    78,897.47x = 108,873.72 × 43,080.21
  4. Step 4: Simplify right side
    78,897.47x = 4,690,302,721.08
  5. Step 5: Solve for x
    x = 4,690,302,721.08/78,897.47
  6. Step 6: Final answer
    x = 59,448.08

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1.5x scale

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.