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Finding the Fourth Proportional to 77,381.60, 116,145.30 and 66,300.80

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Solution

The fourth proportional to 77,381.60, 116,145.30 and 66,300.80 is: 99,513.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,381.60 : 116,145.30 = 66,300.80 : x
  2. Step 2: Convert to fraction form
    77,381.60/116,145.30 = 66,300.80/x
  3. Step 3: Cross multiply
    77,381.60x = 116,145.30 × 66,300.80
  4. Step 4: Simplify right side
    77,381.60x = 7,700,526,306.24
  5. Step 5: Solve for x
    x = 7,700,526,306.24/77,381.60
  6. Step 6: Final answer
    x = 99,513.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.