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Finding the Fourth Proportional to 90,964, 136,279.75 and 65,941.99

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Solution

The fourth proportional to 90,964, 136,279.75 and 65,941.99 is: 98,792.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,964 : 136,279.75 = 65,941.99 : x
  2. Step 2: Convert to fraction form
    90,964/136,279.75 = 65,941.99/x
  3. Step 3: Cross multiply
    90,964x = 136,279.75 × 65,941.99
  4. Step 4: Simplify right side
    90,964x = 8,986,557,911.70
  5. Step 5: Solve for x
    x = 8,986,557,911.70/90,964
  6. Step 6: Final answer
    x = 98,792.47

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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.