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Finding the Fourth Proportional to 213,104.40, 319,437.90 and 124,312.20

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Solution

The fourth proportional to 213,104.40, 319,437.90 and 124,312.20 is: 186,340.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,104.40 : 319,437.90 = 124,312.20 : x
  2. Step 2: Convert to fraction form
    213,104.40/319,437.90 = 124,312.20/x
  3. Step 3: Cross multiply
    213,104.40x = 319,437.90 × 124,312.20
  4. Step 4: Simplify right side
    213,104.40x = 39,710,028,112.38
  5. Step 5: Solve for x
    x = 39,710,028,112.38/213,104.40
  6. Step 6: Final answer
    x = 186,340.72

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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.