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Finding the Fourth Proportional to 70,442.66, 105,625.10 and 28,918.82

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Solution

The fourth proportional to 70,442.66, 105,625.10 and 28,918.82 is: 43,362.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,442.66 : 105,625.10 = 28,918.82 : x
  2. Step 2: Convert to fraction form
    70,442.66/105,625.10 = 28,918.82/x
  3. Step 3: Cross multiply
    70,442.66x = 105,625.10 × 28,918.82
  4. Step 4: Simplify right side
    70,442.66x = 3,054,553,254.38
  5. Step 5: Solve for x
    x = 3,054,553,254.38/70,442.66
  6. Step 6: Final answer
    x = 43,362.26

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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.