Home / 103,853.80-143,336.89-99,120.76

Finding the Fourth Proportional to 103,853.80, 143,336.89 and 99,120.76

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Solution

The fourth proportional to 103,853.80, 143,336.89 and 99,120.76 is: 136,804.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,853.80 : 143,336.89 = 99,120.76 : x
  2. Step 2: Convert to fraction form
    103,853.80/143,336.89 = 99,120.76/x
  3. Step 3: Cross multiply
    103,853.80x = 143,336.89 × 99,120.76
  4. Step 4: Simplify right side
    103,853.80x = 14,207,662,044.67
  5. Step 5: Solve for x
    x = 14,207,662,044.67/103,853.80
  6. Step 6: Final answer
    x = 136,804.46

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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.