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Finding the Fourth Proportional to 72,773,165.78, 109,161,964.67 and 28,455,681.49

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Solution

The fourth proportional to 72,773,165.78, 109,161,964.67 and 28,455,681.49 is: 42,684,388.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,773,165.78 : 109,161,964.67 = 28,455,681.49 : x
  2. Step 2: Convert to fraction form
    72,773,165.78/109,161,964.67 = 28,455,681.49/x
  3. Step 3: Cross multiply
    72,773,165.78x = 109,161,964.67 × 28,455,681.49
  4. Step 4: Simplify right side
    72,773,165.78x = 3,106,278,097,056,970
  5. Step 5: Solve for x
    x = 3,106,278,097,056,970/72,773,165.78
  6. Step 6: Final answer
    x = 42,684,388.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.