Home / 142,140.50-196,153.84-81,722.96

Finding the Fourth Proportional to 142,140.50, 196,153.84 and 81,722.96

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Solution

The fourth proportional to 142,140.50, 196,153.84 and 81,722.96 is: 112,777.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,140.50 : 196,153.84 = 81,722.96 : x
  2. Step 2: Convert to fraction form
    142,140.50/196,153.84 = 81,722.96/x
  3. Step 3: Cross multiply
    142,140.50x = 196,153.84 × 81,722.96
  4. Step 4: Simplify right side
    142,140.50x = 16,030,272,420.17
  5. Step 5: Solve for x
    x = 16,030,272,420.17/142,140.50
  6. Step 6: Final answer
    x = 112,777.66

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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.