Home / 103,724.16-143,064-71,894.40

Finding the Fourth Proportional to 103,724.16, 143,064 and 71,894.40

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Solution

The fourth proportional to 103,724.16, 143,064 and 71,894.40 is: 99,162.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,724.16 : 143,064 = 71,894.40 : x
  2. Step 2: Convert to fraction form
    103,724.16/143,064 = 71,894.40/x
  3. Step 3: Cross multiply
    103,724.16x = 143,064 × 71,894.40
  4. Step 4: Simplify right side
    103,724.16x = 10,285,500,441.60
  5. Step 5: Solve for x
    x = 10,285,500,441.60/103,724.16
  6. Step 6: Final answer
    x = 99,162.05

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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.