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Finding the Fourth Proportional to 145,156.96, 217,679.46 and 56,398.78

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Solution

The fourth proportional to 145,156.96, 217,679.46 and 56,398.78 is: 84,576.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,156.96 : 217,679.46 = 56,398.78 : x
  2. Step 2: Convert to fraction form
    145,156.96/217,679.46 = 56,398.78/x
  3. Step 3: Cross multiply
    145,156.96x = 217,679.46 × 56,398.78
  4. Step 4: Simplify right side
    145,156.96x = 12,276,855,975.06
  5. Step 5: Solve for x
    x = 12,276,855,975.06/145,156.96
  6. Step 6: Final answer
    x = 84,576.42

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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.