Home / 103,623.20-155,434.80-66,298.40

Finding the Fourth Proportional to 103,623.20, 155,434.80 and 66,298.40

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Solution

The fourth proportional to 103,623.20, 155,434.80 and 66,298.40 is: 99,447.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,623.20 : 155,434.80 = 66,298.40 : x
  2. Step 2: Convert to fraction form
    103,623.20/155,434.80 = 66,298.40/x
  3. Step 3: Cross multiply
    103,623.20x = 155,434.80 × 66,298.40
  4. Step 4: Simplify right side
    103,623.20x = 10,305,078,544.32
  5. Step 5: Solve for x
    x = 10,305,078,544.32/103,623.20
  6. Step 6: Final answer
    x = 99,447.60

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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.