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Finding the Fourth Proportional to 58,451.40, 87,688.10 and 19,019.78

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Solution

The fourth proportional to 58,451.40, 87,688.10 and 19,019.78 is: 28,533.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,451.40 : 87,688.10 = 19,019.78 : x
  2. Step 2: Convert to fraction form
    58,451.40/87,688.10 = 19,019.78/x
  3. Step 3: Cross multiply
    58,451.40x = 87,688.10 × 19,019.78
  4. Step 4: Simplify right side
    58,451.40x = 1,667,808,370.62
  5. Step 5: Solve for x
    x = 1,667,808,370.62/58,451.40
  6. Step 6: Final answer
    x = 28,533.25

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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.