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Finding the Fourth Proportional to 90,068.16, 134,954.64 and 63,643.80

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Solution

The fourth proportional to 90,068.16, 134,954.64 and 63,643.80 is: 95,361.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,068.16 : 134,954.64 = 63,643.80 : x
  2. Step 2: Convert to fraction form
    90,068.16/134,954.64 = 63,643.80/x
  3. Step 3: Cross multiply
    90,068.16x = 134,954.64 × 63,643.80
  4. Step 4: Simplify right side
    90,068.16x = 8,589,026,117.23
  5. Step 5: Solve for x
    x = 8,589,026,117.23/90,068.16
  6. Step 6: Final answer
    x = 95,361.40

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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.