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Finding the Fourth Proportional to 58,215, 80,349.66 and 36,990.12

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Solution

The fourth proportional to 58,215, 80,349.66 and 36,990.12 is: 51,054.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,215 : 80,349.66 = 36,990.12 : x
  2. Step 2: Convert to fraction form
    58,215/80,349.66 = 36,990.12/x
  3. Step 3: Cross multiply
    58,215x = 80,349.66 × 36,990.12
  4. Step 4: Simplify right side
    58,215x = 2,972,143,565.36
  5. Step 5: Solve for x
    x = 2,972,143,565.36/58,215
  6. Step 6: Final answer
    x = 51,054.60

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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.