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Finding the Fourth Proportional to 142,606.46, 196,798.47 and 78,945.32

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Solution

The fourth proportional to 142,606.46, 196,798.47 and 78,945.32 is: 108,945.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,606.46 : 196,798.47 = 78,945.32 : x
  2. Step 2: Convert to fraction form
    142,606.46/196,798.47 = 78,945.32/x
  3. Step 3: Cross multiply
    142,606.46x = 196,798.47 × 78,945.32
  4. Step 4: Simplify right side
    142,606.46x = 15,536,318,189.66
  5. Step 5: Solve for x
    x = 15,536,318,189.66/142,606.46
  6. Step 6: Final answer
    x = 108,945.40

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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.