Home / 142,490.21-196,630.54-77,959.13

Finding the Fourth Proportional to 142,490.21, 196,630.54 and 77,959.13

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Solution

The fourth proportional to 142,490.21, 196,630.54 and 77,959.13 is: 107,580.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,490.21 : 196,630.54 = 77,959.13 : x
  2. Step 2: Convert to fraction form
    142,490.21/196,630.54 = 77,959.13/x
  3. Step 3: Cross multiply
    142,490.21x = 196,630.54 × 77,959.13
  4. Step 4: Simplify right side
    142,490.21x = 15,329,144,651.78
  5. Step 5: Solve for x
    x = 15,329,144,651.78/142,490.21
  6. Step 6: Final answer
    x = 107,580.34

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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.