Home / 42,913.40-64,542.90-38,420.60

Finding the Fourth Proportional to 42,913.40, 64,542.90 and 38,420.60

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Solution

The fourth proportional to 42,913.40, 64,542.90 and 38,420.60 is: 57,785.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,913.40 : 64,542.90 = 38,420.60 : x
  2. Step 2: Convert to fraction form
    42,913.40/64,542.90 = 38,420.60/x
  3. Step 3: Cross multiply
    42,913.40x = 64,542.90 × 38,420.60
  4. Step 4: Simplify right side
    42,913.40x = 2,479,776,943.74
  5. Step 5: Solve for x
    x = 2,479,776,943.74/42,913.40
  6. Step 6: Final answer
    x = 57,785.61

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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.