Home / 103,207.80-142,428.24-77,320.48

Finding the Fourth Proportional to 103,207.80, 142,428.24 and 77,320.48

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Solution

The fourth proportional to 103,207.80, 142,428.24 and 77,320.48 is: 106,703.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,207.80 : 142,428.24 = 77,320.48 : x
  2. Step 2: Convert to fraction form
    103,207.80/142,428.24 = 77,320.48/x
  3. Step 3: Cross multiply
    103,207.80x = 142,428.24 × 77,320.48
  4. Step 4: Simplify right side
    103,207.80x = 11,012,619,882.36
  5. Step 5: Solve for x
    x = 11,012,619,882.36/103,207.80
  6. Step 6: Final answer
    x = 106,703.37

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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.