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Finding the Fourth Proportional to 118,790.72, 163,931.22 and 65,077.66

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Solution

The fourth proportional to 118,790.72, 163,931.22 and 65,077.66 is: 89,807.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,790.72 : 163,931.22 = 65,077.66 : x
  2. Step 2: Convert to fraction form
    118,790.72/163,931.22 = 65,077.66/x
  3. Step 3: Cross multiply
    118,790.72x = 163,931.22 × 65,077.66
  4. Step 4: Simplify right side
    118,790.72x = 10,668,260,198.55
  5. Step 5: Solve for x
    x = 10,668,260,198.55/118,790.72
  6. Step 6: Final answer
    x = 89,807.19

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1.5x scale

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.