Home / 142,121.72-196,124.80-77,588.47

Finding the Fourth Proportional to 142,121.72, 196,124.80 and 77,588.47

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Solution

The fourth proportional to 142,121.72, 196,124.80 and 77,588.47 is: 107,070.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,121.72 : 196,124.80 = 77,588.47 : x
  2. Step 2: Convert to fraction form
    142,121.72/196,124.80 = 77,588.47/x
  3. Step 3: Cross multiply
    142,121.72x = 196,124.80 × 77,588.47
  4. Step 4: Simplify right side
    142,121.72x = 15,217,023,161.06
  5. Step 5: Solve for x
    x = 15,217,023,161.06/142,121.72
  6. Step 6: Final answer
    x = 107,070.36

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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.