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Finding the Fourth Proportional to 208,677.56, 287,981.55 and 118,031.76

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Solution

The fourth proportional to 208,677.56, 287,981.55 and 118,031.76 is: 162,887.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,677.56 : 287,981.55 = 118,031.76 : x
  2. Step 2: Convert to fraction form
    208,677.56/287,981.55 = 118,031.76/x
  3. Step 3: Cross multiply
    208,677.56x = 287,981.55 × 118,031.76
  4. Step 4: Simplify right side
    208,677.56x = 33,990,969,194.03
  5. Step 5: Solve for x
    x = 33,990,969,194.03/208,677.56
  6. Step 6: Final answer
    x = 162,887.52

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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.