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Finding the Fourth Proportional to 7,187,798.89, 9,919,099.92 and 3,924,598.06

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Solution

The fourth proportional to 7,187,798.89, 9,919,099.92 and 3,924,598.06 is: 5,415,911.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187,798.89 : 9,919,099.92 = 3,924,598.06 : x
  2. Step 2: Convert to fraction form
    7,187,798.89/9,919,099.92 = 3,924,598.06/x
  3. Step 3: Cross multiply
    7,187,798.89x = 9,919,099.92 × 3,924,598.06
  4. Step 4: Simplify right side
    7,187,798.89x = 38,928,480,302,978.16
  5. Step 5: Solve for x
    x = 38,928,480,302,978.16/7,187,798.89
  6. Step 6: Final answer
    x = 5,415,911.17

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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.