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Finding the Fourth Proportional to 118,433.63, 163,438.21 and 64,718.66

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Solution

The fourth proportional to 118,433.63, 163,438.21 and 64,718.66 is: 89,311.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,433.63 : 163,438.21 = 64,718.66 : x
  2. Step 2: Convert to fraction form
    118,433.63/163,438.21 = 64,718.66/x
  3. Step 3: Cross multiply
    118,433.63x = 163,438.21 × 64,718.66
  4. Step 4: Simplify right side
    118,433.63x = 10,577,501,944.00
  5. Step 5: Solve for x
    x = 10,577,501,944.00/118,433.63
  6. Step 6: Final answer
    x = 89,311.64

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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.