Home / 103,661.96-143,073.08-64,917.78

Finding the Fourth Proportional to 103,661.96, 143,073.08 and 64,917.78

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Solution

The fourth proportional to 103,661.96, 143,073.08 and 64,917.78 is: 89,598.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,661.96 : 143,073.08 = 64,917.78 : x
  2. Step 2: Convert to fraction form
    103,661.96/143,073.08 = 64,917.78/x
  3. Step 3: Cross multiply
    103,661.96x = 143,073.08 × 64,917.78
  4. Step 4: Simplify right side
    103,661.96x = 9,287,986,406.77
  5. Step 5: Solve for x
    x = 9,287,986,406.77/103,661.96
  6. Step 6: Final answer
    x = 89,598.80

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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.