Home / 143,780.36-198,417.69-83,386.81

Finding the Fourth Proportional to 143,780.36, 198,417.69 and 83,386.81

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Solution

The fourth proportional to 143,780.36, 198,417.69 and 83,386.81 is: 115,074.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,780.36 : 198,417.69 = 83,386.81 : x
  2. Step 2: Convert to fraction form
    143,780.36/198,417.69 = 83,386.81/x
  3. Step 3: Cross multiply
    143,780.36x = 198,417.69 × 83,386.81
  4. Step 4: Simplify right side
    143,780.36x = 16,545,418,151.99
  5. Step 5: Solve for x
    x = 16,545,418,151.99/143,780.36
  6. Step 6: Final answer
    x = 115,074.26

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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.