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Finding the Fourth Proportional to 56,103.60, 77,448.60 and 39,981.36

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Solution

The fourth proportional to 56,103.60, 77,448.60 and 39,981.36 is: 55,192.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,103.60 : 77,448.60 = 39,981.36 : x
  2. Step 2: Convert to fraction form
    56,103.60/77,448.60 = 39,981.36/x
  3. Step 3: Cross multiply
    56,103.60x = 77,448.60 × 39,981.36
  4. Step 4: Simplify right side
    56,103.60x = 3,096,500,358.10
  5. Step 5: Solve for x
    x = 3,096,500,358.10/56,103.60
  6. Step 6: Final answer
    x = 55,192.54

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1.5x scale

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.