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Finding the Fourth Proportional to 213,078.52, 319,534.68 and 79,886.20

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Solution

The fourth proportional to 213,078.52, 319,534.68 and 79,886.20 is: 119,798.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,078.52 : 319,534.68 = 79,886.20 : x
  2. Step 2: Convert to fraction form
    213,078.52/319,534.68 = 79,886.20/x
  3. Step 3: Cross multiply
    213,078.52x = 319,534.68 × 79,886.20
  4. Step 4: Simplify right side
    213,078.52x = 25,526,411,353.42
  5. Step 5: Solve for x
    x = 25,526,411,353.42/213,078.52
  6. Step 6: Final answer
    x = 119,798.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.