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Finding the Fourth Proportional to 91,314.81, 125,970.84 and 57,306.42

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Solution

The fourth proportional to 91,314.81, 125,970.84 and 57,306.42 is: 79,055.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,314.81 : 125,970.84 = 57,306.42 : x
  2. Step 2: Convert to fraction form
    91,314.81/125,970.84 = 57,306.42/x
  3. Step 3: Cross multiply
    91,314.81x = 125,970.84 × 57,306.42
  4. Step 4: Simplify right side
    91,314.81x = 7,218,937,864.79
  5. Step 5: Solve for x
    x = 7,218,937,864.79/91,314.81
  6. Step 6: Final answer
    x = 79,055.50

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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.