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Finding the Fourth Proportional to 211,325.52, 291,659.12 and 130,779

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Solution

The fourth proportional to 211,325.52, 291,659.12 and 130,779 is: 180,493.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,325.52 : 291,659.12 = 130,779 : x
  2. Step 2: Convert to fraction form
    211,325.52/291,659.12 = 130,779/x
  3. Step 3: Cross multiply
    211,325.52x = 291,659.12 × 130,779
  4. Step 4: Simplify right side
    211,325.52x = 38,142,888,054.48
  5. Step 5: Solve for x
    x = 38,142,888,054.48/211,325.52
  6. Step 6: Final answer
    x = 180,493.53

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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.