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Finding the Fourth Proportional to 108,522.94, 149,782.62 and 65,509.51

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Solution

The fourth proportional to 108,522.94, 149,782.62 and 65,509.51 is: 90,415.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,522.94 : 149,782.62 = 65,509.51 : x
  2. Step 2: Convert to fraction form
    108,522.94/149,782.62 = 65,509.51/x
  3. Step 3: Cross multiply
    108,522.94x = 149,782.62 × 65,509.51
  4. Step 4: Simplify right side
    108,522.94x = 9,812,186,042.72
  5. Step 5: Solve for x
    x = 9,812,186,042.72/108,522.94
  6. Step 6: Final answer
    x = 90,415.78

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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.