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Finding the Fourth Proportional to 70,389.02, 105,338.08 and 57,590.87

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Solution

The fourth proportional to 70,389.02, 105,338.08 and 57,590.87 is: 86,185.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,389.02 : 105,338.08 = 57,590.87 : x
  2. Step 2: Convert to fraction form
    70,389.02/105,338.08 = 57,590.87/x
  3. Step 3: Cross multiply
    70,389.02x = 105,338.08 × 57,590.87
  4. Step 4: Simplify right side
    70,389.02x = 6,066,511,671.33
  5. Step 5: Solve for x
    x = 6,066,511,671.33/70,389.02
  6. Step 6: Final answer
    x = 86,185.48

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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.