Home / 88,129.50-121,618.74-50,403.78

Finding the Fourth Proportional to 88,129.50, 121,618.74 and 50,403.78

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Solution

The fourth proportional to 88,129.50, 121,618.74 and 50,403.78 is: 69,557.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,129.50 : 121,618.74 = 50,403.78 : x
  2. Step 2: Convert to fraction form
    88,129.50/121,618.74 = 50,403.78/x
  3. Step 3: Cross multiply
    88,129.50x = 121,618.74 × 50,403.78
  4. Step 4: Simplify right side
    88,129.50x = 6,130,044,214.84
  5. Step 5: Solve for x
    x = 6,130,044,214.84/88,129.50
  6. Step 6: Final answer
    x = 69,557.23

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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.