Home / 386,427.20-579,640.80-102,117.20

Finding the Fourth Proportional to 386,427.20, 579,640.80 and 102,117.20

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Solution

The fourth proportional to 386,427.20, 579,640.80 and 102,117.20 is: 153,175.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,427.20 : 579,640.80 = 102,117.20 : x
  2. Step 2: Convert to fraction form
    386,427.20/579,640.80 = 102,117.20/x
  3. Step 3: Cross multiply
    386,427.20x = 579,640.80 × 102,117.20
  4. Step 4: Simplify right side
    386,427.20x = 59,191,295,501.76
  5. Step 5: Solve for x
    x = 59,191,295,501.76/386,427.20
  6. Step 6: Final answer
    x = 153,175.80

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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.