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Finding the Fourth Proportional to 208,130.82, 287,220.89 and 112,637.59

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Solution

The fourth proportional to 208,130.82, 287,220.89 and 112,637.59 is: 155,440.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,130.82 : 287,220.89 = 112,637.59 : x
  2. Step 2: Convert to fraction form
    208,130.82/287,220.89 = 112,637.59/x
  3. Step 3: Cross multiply
    208,130.82x = 287,220.89 × 112,637.59
  4. Step 4: Simplify right side
    208,130.82x = 32,351,868,847.26
  5. Step 5: Solve for x
    x = 32,351,868,847.26/208,130.82
  6. Step 6: Final answer
    x = 155,440.07

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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.