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Finding the Fourth Proportional to 107,689.77, 148,612.73 and 65,218.77

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Solution

The fourth proportional to 107,689.77, 148,612.73 and 65,218.77 is: 90,002.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,689.77 : 148,612.73 = 65,218.77 : x
  2. Step 2: Convert to fraction form
    107,689.77/148,612.73 = 65,218.77/x
  3. Step 3: Cross multiply
    107,689.77x = 148,612.73 × 65,218.77
  4. Step 4: Simplify right side
    107,689.77x = 9,692,339,130.85
  5. Step 5: Solve for x
    x = 9,692,339,130.85/107,689.77
  6. Step 6: Final answer
    x = 90,002.41

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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.