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Finding the Fourth Proportional to 208,484.13, 287,700.37 and 112,988.78

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Solution

The fourth proportional to 208,484.13, 287,700.37 and 112,988.78 is: 155,920.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,484.13 : 287,700.37 = 112,988.78 : x
  2. Step 2: Convert to fraction form
    208,484.13/287,700.37 = 112,988.78/x
  3. Step 3: Cross multiply
    208,484.13x = 287,700.37 × 112,988.78
  4. Step 4: Simplify right side
    208,484.13x = 32,506,913,811.85
  5. Step 5: Solve for x
    x = 32,506,913,811.85/208,484.13
  6. Step 6: Final answer
    x = 155,920.33

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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.