Home / 142,347.97-196,441.37-78,686.83

Finding the Fourth Proportional to 142,347.97, 196,441.37 and 78,686.83

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Solution

The fourth proportional to 142,347.97, 196,441.37 and 78,686.83 is: 108,588.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,347.97 : 196,441.37 = 78,686.83 : x
  2. Step 2: Convert to fraction form
    142,347.97/196,441.37 = 78,686.83/x
  3. Step 3: Cross multiply
    142,347.97x = 196,441.37 × 78,686.83
  4. Step 4: Simplify right side
    142,347.97x = 15,457,348,686.16
  5. Step 5: Solve for x
    x = 15,457,348,686.16/142,347.97
  6. Step 6: Final answer
    x = 108,588.47

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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.