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Finding the Fourth Proportional to 76,371.64, 105,393.48 and 42,380.28

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Solution

The fourth proportional to 76,371.64, 105,393.48 and 42,380.28 is: 58,485.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,371.64 : 105,393.48 = 42,380.28 : x
  2. Step 2: Convert to fraction form
    76,371.64/105,393.48 = 42,380.28/x
  3. Step 3: Cross multiply
    76,371.64x = 105,393.48 × 42,380.28
  4. Step 4: Simplify right side
    76,371.64x = 4,466,605,192.57
  5. Step 5: Solve for x
    x = 4,466,605,192.57/76,371.64
  6. Step 6: Final answer
    x = 58,485.13

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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.