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Finding the Fourth Proportional to 56,894.81, 78,386.64 and 39,650.92

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Solution

The fourth proportional to 56,894.81, 78,386.64 and 39,650.92 is: 54,628.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,894.81 : 78,386.64 = 39,650.92 : x
  2. Step 2: Convert to fraction form
    56,894.81/78,386.64 = 39,650.92/x
  3. Step 3: Cross multiply
    56,894.81x = 78,386.64 × 39,650.92
  4. Step 4: Simplify right side
    56,894.81x = 3,108,102,047.05
  5. Step 5: Solve for x
    x = 3,108,102,047.05/56,894.81
  6. Step 6: Final answer
    x = 54,628.93

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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.