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Finding the Fourth Proportional to 90,744.80, 136,117.20 and 77,622.80

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Solution

The fourth proportional to 90,744.80, 136,117.20 and 77,622.80 is: 116,434.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,744.80 : 136,117.20 = 77,622.80 : x
  2. Step 2: Convert to fraction form
    90,744.80/136,117.20 = 77,622.80/x
  3. Step 3: Cross multiply
    90,744.80x = 136,117.20 × 77,622.80
  4. Step 4: Simplify right side
    90,744.80x = 10,565,798,192.16
  5. Step 5: Solve for x
    x = 10,565,798,192.16/90,744.80
  6. Step 6: Final answer
    x = 116,434.20

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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.