Home / 142,055.72-196,031.75-78,392.15

Finding the Fourth Proportional to 142,055.72, 196,031.75 and 78,392.15

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Solution

The fourth proportional to 142,055.72, 196,031.75 and 78,392.15 is: 108,178.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,055.72 : 196,031.75 = 78,392.15 : x
  2. Step 2: Convert to fraction form
    142,055.72/196,031.75 = 78,392.15/x
  3. Step 3: Cross multiply
    142,055.72x = 196,031.75 × 78,392.15
  4. Step 4: Simplify right side
    142,055.72x = 15,367,350,350.76
  5. Step 5: Solve for x
    x = 15,367,350,350.76/142,055.72
  6. Step 6: Final answer
    x = 108,178.33

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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.