Home / 257,817.60-386,681.76-70,785.36

Finding the Fourth Proportional to 257,817.60, 386,681.76 and 70,785.36

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Solution

The fourth proportional to 257,817.60, 386,681.76 and 70,785.36 is: 106,165.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,817.60 : 386,681.76 = 70,785.36 : x
  2. Step 2: Convert to fraction form
    257,817.60/386,681.76 = 70,785.36/x
  3. Step 3: Cross multiply
    257,817.60x = 386,681.76 × 70,785.36
  4. Step 4: Simplify right side
    257,817.60x = 27,371,407,587.03
  5. Step 5: Solve for x
    x = 27,371,407,587.03/257,817.60
  6. Step 6: Final answer
    x = 106,165.78

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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.