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Finding the Fourth Proportional to 208,486.68, 287,712.12 and 112,993.35

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Solution

The fourth proportional to 208,486.68, 287,712.12 and 112,993.35 is: 155,931.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,486.68 : 287,712.12 = 112,993.35 : x
  2. Step 2: Convert to fraction form
    208,486.68/287,712.12 = 112,993.35/x
  3. Step 3: Cross multiply
    208,486.68x = 287,712.12 × 112,993.35
  4. Step 4: Simplify right side
    208,486.68x = 32,509,556,274.40
  5. Step 5: Solve for x
    x = 32,509,556,274.40/208,486.68
  6. Step 6: Final answer
    x = 155,931.09

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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.