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Finding the Fourth Proportional to 111,489.58, 153,866.55 and 63,749.98

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Solution

The fourth proportional to 111,489.58, 153,866.55 and 63,749.98 is: 87,981.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,489.58 : 153,866.55 = 63,749.98 : x
  2. Step 2: Convert to fraction form
    111,489.58/153,866.55 = 63,749.98/x
  3. Step 3: Cross multiply
    111,489.58x = 153,866.55 × 63,749.98
  4. Step 4: Simplify right side
    111,489.58x = 9,808,989,485.17
  5. Step 5: Solve for x
    x = 9,808,989,485.17/111,489.58
  6. Step 6: Final answer
    x = 87,981.22

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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.