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Finding the Fourth Proportional to 7,187,703.25, 9,919,168.60 and 3,924,647.31

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Solution

The fourth proportional to 7,187,703.25, 9,919,168.60 and 3,924,647.31 is: 5,416,088.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187,703.25 : 9,919,168.60 = 3,924,647.31 : x
  2. Step 2: Convert to fraction form
    7,187,703.25/9,919,168.60 = 3,924,647.31/x
  3. Step 3: Cross multiply
    7,187,703.25x = 9,919,168.60 × 3,924,647.31
  4. Step 4: Simplify right side
    7,187,703.25x = 38,929,238,363,426.47
  5. Step 5: Solve for x
    x = 38,929,238,363,426.47/7,187,703.25
  6. Step 6: Final answer
    x = 5,416,088.70

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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.