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Finding the Fourth Proportional to 208,483.80, 287,699.94 and 112,988.45

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Solution

The fourth proportional to 208,483.80, 287,699.94 and 112,988.45 is: 155,919.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,483.80 : 287,699.94 = 112,988.45 : x
  2. Step 2: Convert to fraction form
    208,483.80/287,699.94 = 112,988.45/x
  3. Step 3: Cross multiply
    208,483.80x = 287,699.94 × 112,988.45
  4. Step 4: Simplify right side
    208,483.80x = 32,506,768,847.19
  5. Step 5: Solve for x
    x = 32,506,768,847.19/208,483.80
  6. Step 6: Final answer
    x = 155,919.88

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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.