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Finding the Fourth Proportional to 61,113.60, 91,756.80 and 37,785.60

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Solution

The fourth proportional to 61,113.60, 91,756.80 and 37,785.60 is: 56,731.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,113.60 : 91,756.80 = 37,785.60 : x
  2. Step 2: Convert to fraction form
    61,113.60/91,756.80 = 37,785.60/x
  3. Step 3: Cross multiply
    61,113.60x = 91,756.80 × 37,785.60
  4. Step 4: Simplify right side
    61,113.60x = 3,467,085,742.08
  5. Step 5: Solve for x
    x = 3,467,085,742.08/61,113.60
  6. Step 6: Final answer
    x = 56,731.82

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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.