Home / 142,122.51-196,127.80-78,458.94

Finding the Fourth Proportional to 142,122.51, 196,127.80 and 78,458.94

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Solution

The fourth proportional to 142,122.51, 196,127.80 and 78,458.94 is: 108,272.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,122.51 : 196,127.80 = 78,458.94 : x
  2. Step 2: Convert to fraction form
    142,122.51/196,127.80 = 78,458.94/x
  3. Step 3: Cross multiply
    142,122.51x = 196,127.80 × 78,458.94
  4. Step 4: Simplify right side
    142,122.51x = 15,387,979,292.53
  5. Step 5: Solve for x
    x = 15,387,979,292.53/142,122.51
  6. Step 6: Final answer
    x = 108,272.64

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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.