Home / 104,985.43-145,018.19-77,816.59

Finding the Fourth Proportional to 104,985.43, 145,018.19 and 77,816.59

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Solution

The fourth proportional to 104,985.43, 145,018.19 and 77,816.59 is: 107,489.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,985.43 : 145,018.19 = 77,816.59 : x
  2. Step 2: Convert to fraction form
    104,985.43/145,018.19 = 77,816.59/x
  3. Step 3: Cross multiply
    104,985.43x = 145,018.19 × 77,816.59
  4. Step 4: Simplify right side
    104,985.43x = 11,284,821,033.77
  5. Step 5: Solve for x
    x = 11,284,821,033.77/104,985.43
  6. Step 6: Final answer
    x = 107,489.40

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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.