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Finding the Fourth Proportional to 58,372, 87,570.78 and 18,933.10

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Solution

The fourth proportional to 58,372, 87,570.78 and 18,933.10 is: 28,403.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,372 : 87,570.78 = 18,933.10 : x
  2. Step 2: Convert to fraction form
    58,372/87,570.78 = 18,933.10/x
  3. Step 3: Cross multiply
    58,372x = 87,570.78 × 18,933.10
  4. Step 4: Simplify right side
    58,372x = 1,657,986,334.82
  5. Step 5: Solve for x
    x = 1,657,986,334.82/58,372
  6. Step 6: Final answer
    x = 28,403.80

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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.