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Finding the Fourth Proportional to 208,122.90, 287,208.54 and 112,628.76

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Solution

The fourth proportional to 208,122.90, 287,208.54 and 112,628.76 is: 155,427.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,122.90 : 287,208.54 = 112,628.76 : x
  2. Step 2: Convert to fraction form
    208,122.90/287,208.54 = 112,628.76/x
  3. Step 3: Cross multiply
    208,122.90x = 287,208.54 × 112,628.76
  4. Step 4: Simplify right side
    208,122.90x = 32,347,941,721.61
  5. Step 5: Solve for x
    x = 32,347,941,721.61/208,122.90
  6. Step 6: Final answer
    x = 155,427.11

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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.