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Finding the Fourth Proportional to 60,289.86, 90,447.75 and 20,312.81

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Solution

The fourth proportional to 60,289.86, 90,447.75 and 20,312.81 is: 30,473.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,289.86 : 90,447.75 = 20,312.81 : x
  2. Step 2: Convert to fraction form
    60,289.86/90,447.75 = 20,312.81/x
  3. Step 3: Cross multiply
    60,289.86x = 90,447.75 × 20,312.81
  4. Step 4: Simplify right side
    60,289.86x = 1,837,248,110.62
  5. Step 5: Solve for x
    x = 1,837,248,110.62/60,289.86
  6. Step 6: Final answer
    x = 30,473.59

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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.