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Finding the Fourth Proportional to 111,455.55, 153,808.65 and 63,709.92

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Solution

The fourth proportional to 111,455.55, 153,808.65 and 63,709.92 is: 87,919.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,455.55 : 153,808.65 = 63,709.92 : x
  2. Step 2: Convert to fraction form
    111,455.55/153,808.65 = 63,709.92/x
  3. Step 3: Cross multiply
    111,455.55x = 153,808.65 × 63,709.92
  4. Step 4: Simplify right side
    111,455.55x = 9,799,136,786.81
  5. Step 5: Solve for x
    x = 9,799,136,786.81/111,455.55
  6. Step 6: Final answer
    x = 87,919.68

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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.