Home / 142,031.36-196,002.84-78,368.60

Finding the Fourth Proportional to 142,031.36, 196,002.84 and 78,368.60

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Solution

The fourth proportional to 142,031.36, 196,002.84 and 78,368.60 is: 108,148.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,031.36 : 196,002.84 = 78,368.60 : x
  2. Step 2: Convert to fraction form
    142,031.36/196,002.84 = 78,368.60/x
  3. Step 3: Cross multiply
    142,031.36x = 196,002.84 × 78,368.60
  4. Step 4: Simplify right side
    142,031.36x = 15,360,468,166.82
  5. Step 5: Solve for x
    x = 15,360,468,166.82/142,031.36
  6. Step 6: Final answer
    x = 108,148.43

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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.