Home / 142,640.34-196,854.75-78,984.06

Finding the Fourth Proportional to 142,640.34, 196,854.75 and 78,984.06

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Solution

The fourth proportional to 142,640.34, 196,854.75 and 78,984.06 is: 109,004.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,640.34 : 196,854.75 = 78,984.06 : x
  2. Step 2: Convert to fraction form
    142,640.34/196,854.75 = 78,984.06/x
  3. Step 3: Cross multiply
    142,640.34x = 196,854.75 × 78,984.06
  4. Step 4: Simplify right side
    142,640.34x = 15,548,387,385.29
  5. Step 5: Solve for x
    x = 15,548,387,385.29/142,640.34
  6. Step 6: Final answer
    x = 109,004.14

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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.