Home / 85,880.02-128,688.66-45,904.69

Finding the Fourth Proportional to 85,880.02, 128,688.66 and 45,904.69

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Solution

The fourth proportional to 85,880.02, 128,688.66 and 45,904.69 is: 68,786.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,880.02 : 128,688.66 = 45,904.69 : x
  2. Step 2: Convert to fraction form
    85,880.02/128,688.66 = 45,904.69/x
  3. Step 3: Cross multiply
    85,880.02x = 128,688.66 × 45,904.69
  4. Step 4: Simplify right side
    85,880.02x = 5,907,413,204.68
  5. Step 5: Solve for x
    x = 5,907,413,204.68/85,880.02
  6. Step 6: Final answer
    x = 68,786.82

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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.