Home / 208,275.12-287,420.40-112,781.52

Finding the Fourth Proportional to 208,275.12, 287,420.40 and 112,781.52

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Solution

The fourth proportional to 208,275.12, 287,420.40 and 112,781.52 is: 155,638.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,275.12 : 287,420.40 = 112,781.52 : x
  2. Step 2: Convert to fraction form
    208,275.12/287,420.40 = 112,781.52/x
  3. Step 3: Cross multiply
    208,275.12x = 287,420.40 × 112,781.52
  4. Step 4: Simplify right side
    208,275.12x = 32,415,709,591.01
  5. Step 5: Solve for x
    x = 32,415,709,591.01/208,275.12
  6. Step 6: Final answer
    x = 155,638.90

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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.