Home / 88,213.83-121,815.78-56,438.55

Finding the Fourth Proportional to 88,213.83, 121,815.78 and 56,438.55

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Solution

The fourth proportional to 88,213.83, 121,815.78 and 56,438.55 is: 77,936.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,213.83 : 121,815.78 = 56,438.55 : x
  2. Step 2: Convert to fraction form
    88,213.83/121,815.78 = 56,438.55/x
  3. Step 3: Cross multiply
    88,213.83x = 121,815.78 × 56,438.55
  4. Step 4: Simplify right side
    88,213.83x = 6,875,105,990.32
  5. Step 5: Solve for x
    x = 6,875,105,990.32/88,213.83
  6. Step 6: Final answer
    x = 77,936.83

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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.