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Finding the Fourth Proportional to 58,159.56, 87,239.34 and 18,719.76

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Solution

The fourth proportional to 58,159.56, 87,239.34 and 18,719.76 is: 28,079.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,159.56 : 87,239.34 = 18,719.76 : x
  2. Step 2: Convert to fraction form
    58,159.56/87,239.34 = 18,719.76/x
  3. Step 3: Cross multiply
    58,159.56x = 87,239.34 × 18,719.76
  4. Step 4: Simplify right side
    58,159.56x = 1,633,099,507.36
  5. Step 5: Solve for x
    x = 1,633,099,507.36/58,159.56
  6. Step 6: Final answer
    x = 28,079.64

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1.5x scale

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.