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Finding the Fourth Proportional to 88,289.34, 121,758.57 and 65,684.94

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Solution

The fourth proportional to 88,289.34, 121,758.57 and 65,684.94 is: 90,585.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,289.34 : 121,758.57 = 65,684.94 : x
  2. Step 2: Convert to fraction form
    88,289.34/121,758.57 = 65,684.94/x
  3. Step 3: Cross multiply
    88,289.34x = 121,758.57 × 65,684.94
  4. Step 4: Simplify right side
    88,289.34x = 7,997,704,364.94
  5. Step 5: Solve for x
    x = 7,997,704,364.94/88,289.34
  6. Step 6: Final answer
    x = 90,585.16

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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.