Home / 142,090.10-196,070.36-78,423.78

Finding the Fourth Proportional to 142,090.10, 196,070.36 and 78,423.78

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Solution

The fourth proportional to 142,090.10, 196,070.36 and 78,423.78 is: 108,217.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,090.10 : 196,070.36 = 78,423.78 : x
  2. Step 2: Convert to fraction form
    142,090.10/196,070.36 = 78,423.78/x
  3. Step 3: Cross multiply
    142,090.10x = 196,070.36 × 78,423.78
  4. Step 4: Simplify right side
    142,090.10x = 15,376,578,777.16
  5. Step 5: Solve for x
    x = 15,376,578,777.16/142,090.10
  6. Step 6: Final answer
    x = 108,217.10

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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.