Home / 142,189.64-196,218.60-77,656.76

Finding the Fourth Proportional to 142,189.64, 196,218.60 and 77,656.76

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Solution

The fourth proportional to 142,189.64, 196,218.60 and 77,656.76 is: 107,164.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,189.64 : 196,218.60 = 77,656.76 : x
  2. Step 2: Convert to fraction form
    142,189.64/196,218.60 = 77,656.76/x
  3. Step 3: Cross multiply
    142,189.64x = 196,218.60 × 77,656.76
  4. Step 4: Simplify right side
    142,189.64x = 15,237,700,727.74
  5. Step 5: Solve for x
    x = 15,237,700,727.74/142,189.64
  6. Step 6: Final answer
    x = 107,164.63

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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.