Home / 142,161.10-196,192.64-81,750.69

Finding the Fourth Proportional to 142,161.10, 196,192.64 and 81,750.69

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Solution

The fourth proportional to 142,161.10, 196,192.64 and 81,750.69 is: 112,821.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,161.10 : 196,192.64 = 81,750.69 : x
  2. Step 2: Convert to fraction form
    142,161.10/196,192.64 = 81,750.69/x
  3. Step 3: Cross multiply
    142,161.10x = 196,192.64 × 81,750.69
  4. Step 4: Simplify right side
    142,161.10x = 16,038,883,897.30
  5. Step 5: Solve for x
    x = 16,038,883,897.30/142,161.10
  6. Step 6: Final answer
    x = 112,821.89

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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.