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Finding the Fourth Proportional to 145,149.21, 217,737.59 and 56,409.57

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Solution

The fourth proportional to 145,149.21, 217,737.59 and 56,409.57 is: 84,619.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,149.21 : 217,737.59 = 56,409.57 : x
  2. Step 2: Convert to fraction form
    145,149.21/217,737.59 = 56,409.57/x
  3. Step 3: Cross multiply
    145,149.21x = 217,737.59 × 56,409.57
  4. Step 4: Simplify right side
    145,149.21x = 12,282,483,542.69
  5. Step 5: Solve for x
    x = 12,282,483,542.69/145,149.21
  6. Step 6: Final answer
    x = 84,619.71

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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.