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Finding the Fourth Proportional to 56,730.79, 85,100.10 and 19,275.58

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Solution

The fourth proportional to 56,730.79, 85,100.10 and 19,275.58 is: 28,914.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,730.79 : 85,100.10 = 19,275.58 : x
  2. Step 2: Convert to fraction form
    56,730.79/85,100.10 = 19,275.58/x
  3. Step 3: Cross multiply
    56,730.79x = 85,100.10 × 19,275.58
  4. Step 4: Simplify right side
    56,730.79x = 1,640,353,785.56
  5. Step 5: Solve for x
    x = 1,640,353,785.56/56,730.79
  6. Step 6: Final answer
    x = 28,914.70

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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.