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Finding the Fourth Proportional to 145,144.70, 217,730.79 and 56,405.04

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Solution

The fourth proportional to 145,144.70, 217,730.79 and 56,405.04 is: 84,612.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,144.70 : 217,730.79 = 56,405.04 : x
  2. Step 2: Convert to fraction form
    145,144.70/217,730.79 = 56,405.04/x
  3. Step 3: Cross multiply
    145,144.70x = 217,730.79 × 56,405.04
  4. Step 4: Simplify right side
    145,144.70x = 12,281,113,919.18
  5. Step 5: Solve for x
    x = 12,281,113,919.18/145,144.70
  6. Step 6: Final answer
    x = 84,612.90

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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.