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Finding the Fourth Proportional to 92,878.47, 128,168.87 and 50,436.09

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Solution

The fourth proportional to 92,878.47, 128,168.87 and 50,436.09 is: 69,599.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,878.47 : 128,168.87 = 50,436.09 : x
  2. Step 2: Convert to fraction form
    92,878.47/128,168.87 = 50,436.09/x
  3. Step 3: Cross multiply
    92,878.47x = 128,168.87 × 50,436.09
  4. Step 4: Simplify right side
    92,878.47x = 6,464,336,410.34
  5. Step 5: Solve for x
    x = 6,464,336,410.34/92,878.47
  6. Step 6: Final answer
    x = 69,599.95

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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.