Home / 142,140.13-196,153.32-81,722.58

Finding the Fourth Proportional to 142,140.13, 196,153.32 and 81,722.58

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Solution

The fourth proportional to 142,140.13, 196,153.32 and 81,722.58 is: 112,777.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,140.13 : 196,153.32 = 81,722.58 : x
  2. Step 2: Convert to fraction form
    142,140.13/196,153.32 = 81,722.58/x
  3. Step 3: Cross multiply
    142,140.13x = 196,153.32 × 81,722.58
  4. Step 4: Simplify right side
    142,140.13x = 16,030,155,385.97
  5. Step 5: Solve for x
    x = 16,030,155,385.97/142,140.13
  6. Step 6: Final answer
    x = 112,777.13

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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.