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Finding the Fourth Proportional to 155,043.40, 213,959.94 and 87,050.92

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Solution

The fourth proportional to 155,043.40, 213,959.94 and 87,050.92 is: 120,130.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,043.40 : 213,959.94 = 87,050.92 : x
  2. Step 2: Convert to fraction form
    155,043.40/213,959.94 = 87,050.92/x
  3. Step 3: Cross multiply
    155,043.40x = 213,959.94 × 87,050.92
  4. Step 4: Simplify right side
    155,043.40x = 18,625,409,620.14
  5. Step 5: Solve for x
    x = 18,625,409,620.14/155,043.40
  6. Step 6: Final answer
    x = 120,130.30

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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.