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Finding the Fourth Proportional to 118,433.87, 163,438.39 and 64,719.21

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Solution

The fourth proportional to 118,433.87, 163,438.39 and 64,719.21 is: 89,312.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,433.87 : 163,438.39 = 64,719.21 : x
  2. Step 2: Convert to fraction form
    118,433.87/163,438.39 = 64,719.21/x
  3. Step 3: Cross multiply
    118,433.87x = 163,438.39 × 64,719.21
  4. Step 4: Simplify right side
    118,433.87x = 10,577,603,484.47
  5. Step 5: Solve for x
    x = 10,577,603,484.47/118,433.87
  6. Step 6: Final answer
    x = 89,312.32

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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.