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Finding the Fourth Proportional to 64,785.55, 89,400.44 and 35,712.98

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Solution

The fourth proportional to 64,785.55, 89,400.44 and 35,712.98 is: 49,281.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,785.55 : 89,400.44 = 35,712.98 : x
  2. Step 2: Convert to fraction form
    64,785.55/89,400.44 = 35,712.98/x
  3. Step 3: Cross multiply
    64,785.55x = 89,400.44 × 35,712.98
  4. Step 4: Simplify right side
    64,785.55x = 3,192,756,125.71
  5. Step 5: Solve for x
    x = 3,192,756,125.71/64,785.55
  6. Step 6: Final answer
    x = 49,281.92

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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.