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Finding the Fourth Proportional to 101,931.59, 140,667.48 and 56,613.77

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Solution

The fourth proportional to 101,931.59, 140,667.48 and 56,613.77 is: 78,128.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,931.59 : 140,667.48 = 56,613.77 : x
  2. Step 2: Convert to fraction form
    101,931.59/140,667.48 = 56,613.77/x
  3. Step 3: Cross multiply
    101,931.59x = 140,667.48 × 56,613.77
  4. Step 4: Simplify right side
    101,931.59x = 7,963,716,359.20
  5. Step 5: Solve for x
    x = 7,963,716,359.20/101,931.59
  6. Step 6: Final answer
    x = 78,128.05

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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.