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Finding the Fourth Proportional to 91,145.66, 125,935.16 and 65,601.50

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Solution

The fourth proportional to 91,145.66, 125,935.16 and 65,601.50 is: 90,641.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,145.66 : 125,935.16 = 65,601.50 : x
  2. Step 2: Convert to fraction form
    91,145.66/125,935.16 = 65,601.50/x
  3. Step 3: Cross multiply
    91,145.66x = 125,935.16 × 65,601.50
  4. Step 4: Simplify right side
    91,145.66x = 8,261,534,441.06
  5. Step 5: Solve for x
    x = 8,261,534,441.06/91,145.66
  6. Step 6: Final answer
    x = 90,641.01

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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.