Home / 208,581.82-287,821.60-128,012.74

Finding the Fourth Proportional to 208,581.82, 287,821.60 and 128,012.74

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Solution

The fourth proportional to 208,581.82, 287,821.60 and 128,012.74 is: 176,644.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,581.82 : 287,821.60 = 128,012.74 : x
  2. Step 2: Convert to fraction form
    208,581.82/287,821.60 = 128,012.74/x
  3. Step 3: Cross multiply
    208,581.82x = 287,821.60 × 128,012.74
  4. Step 4: Simplify right side
    208,581.82x = 36,844,831,647.18
  5. Step 5: Solve for x
    x = 36,844,831,647.18/208,581.82
  6. Step 6: Final answer
    x = 176,644.50

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1.5x scale

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.