Home / 98,123.80-135,409.21-55,103.69

Finding the Fourth Proportional to 98,123.80, 135,409.21 and 55,103.69

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Solution

The fourth proportional to 98,123.80, 135,409.21 and 55,103.69 is: 76,042.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,123.80 : 135,409.21 = 55,103.69 : x
  2. Step 2: Convert to fraction form
    98,123.80/135,409.21 = 55,103.69/x
  3. Step 3: Cross multiply
    98,123.80x = 135,409.21 × 55,103.69
  4. Step 4: Simplify right side
    98,123.80x = 7,461,547,130.98
  5. Step 5: Solve for x
    x = 7,461,547,130.98/98,123.80
  6. Step 6: Final answer
    x = 76,042.17

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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.