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Finding the Fourth Proportional to 145,140.93, 217,790.64 and 56,397.87

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Solution

The fourth proportional to 145,140.93, 217,790.64 and 56,397.87 is: 84,627.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,140.93 : 217,790.64 = 56,397.87 : x
  2. Step 2: Convert to fraction form
    145,140.93/217,790.64 = 56,397.87/x
  3. Step 3: Cross multiply
    145,140.93x = 217,790.64 × 56,397.87
  4. Step 4: Simplify right side
    145,140.93x = 12,282,928,201.94
  5. Step 5: Solve for x
    x = 12,282,928,201.94/145,140.93
  6. Step 6: Final answer
    x = 84,627.60

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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.