Home / 101,931.60-140,667.48-56,613.78

Finding the Fourth Proportional to 101,931.60, 140,667.48 and 56,613.78

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Solution

The fourth proportional to 101,931.60, 140,667.48 and 56,613.78 is: 78,128.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,931.60 : 140,667.48 = 56,613.78 : x
  2. Step 2: Convert to fraction form
    101,931.60/140,667.48 = 56,613.78/x
  3. Step 3: Cross multiply
    101,931.60x = 140,667.48 × 56,613.78
  4. Step 4: Simplify right side
    101,931.60x = 7,963,717,765.87
  5. Step 5: Solve for x
    x = 7,963,717,765.87/101,931.60
  6. Step 6: Final answer
    x = 78,128.06

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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.