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Finding the Fourth Proportional to 208,483.71, 287,707.77 and 112,990.38

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Solution

The fourth proportional to 208,483.71, 287,707.77 and 112,990.38 is: 155,926.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,483.71 : 287,707.77 = 112,990.38 : x
  2. Step 2: Convert to fraction form
    208,483.71/287,707.77 = 112,990.38/x
  3. Step 3: Cross multiply
    208,483.71x = 287,707.77 × 112,990.38
  4. Step 4: Simplify right side
    208,483.71x = 32,508,210,261.25
  5. Step 5: Solve for x
    x = 32,508,210,261.25/208,483.71
  6. Step 6: Final answer
    x = 155,926.86

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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.