Home / 208,581.32-287,820.91-128,012.24

Finding the Fourth Proportional to 208,581.32, 287,820.91 and 128,012.24

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Solution

The fourth proportional to 208,581.32, 287,820.91 and 128,012.24 is: 176,643.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,581.32 : 287,820.91 = 128,012.24 : x
  2. Step 2: Convert to fraction form
    208,581.32/287,820.91 = 128,012.24/x
  3. Step 3: Cross multiply
    208,581.32x = 287,820.91 × 128,012.24
  4. Step 4: Simplify right side
    208,581.32x = 36,844,599,407.94
  5. Step 5: Solve for x
    x = 36,844,599,407.94/208,581.32
  6. Step 6: Final answer
    x = 176,643.81

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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.