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Finding the Fourth Proportional to 128,059.80, 191,652.30 and 112,313.40

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Solution

The fourth proportional to 128,059.80, 191,652.30 and 112,313.40 is: 168,086.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,059.80 : 191,652.30 = 112,313.40 : x
  2. Step 2: Convert to fraction form
    128,059.80/191,652.30 = 112,313.40/x
  3. Step 3: Cross multiply
    128,059.80x = 191,652.30 × 112,313.40
  4. Step 4: Simplify right side
    128,059.80x = 21,525,121,430.82
  5. Step 5: Solve for x
    x = 21,525,121,430.82/128,059.80
  6. Step 6: Final answer
    x = 168,086.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.