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Finding the Fourth Proportional to 91,280.80, 125,965.92 and 50,992

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Solution

The fourth proportional to 91,280.80, 125,965.92 and 50,992 is: 70,368.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,280.80 : 125,965.92 = 50,992 : x
  2. Step 2: Convert to fraction form
    91,280.80/125,965.92 = 50,992/x
  3. Step 3: Cross multiply
    91,280.80x = 125,965.92 × 50,992
  4. Step 4: Simplify right side
    91,280.80x = 6,423,254,192.64
  5. Step 5: Solve for x
    x = 6,423,254,192.64/91,280.80
  6. Step 6: Final answer
    x = 70,368.08

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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.