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Finding the Fourth Proportional to 61,873.61, 85,341.47 and 56,785.52

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Solution

The fourth proportional to 61,873.61, 85,341.47 and 56,785.52 is: 78,323.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,873.61 : 85,341.47 = 56,785.52 : x
  2. Step 2: Convert to fraction form
    61,873.61/85,341.47 = 56,785.52/x
  3. Step 3: Cross multiply
    61,873.61x = 85,341.47 × 56,785.52
  4. Step 4: Simplify right side
    61,873.61x = 4,846,159,680.94
  5. Step 5: Solve for x
    x = 4,846,159,680.94/61,873.61
  6. Step 6: Final answer
    x = 78,323.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.