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Finding the Fourth Proportional to 208,119.51, 287,206.95 and 112,628.21

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Solution

The fourth proportional to 208,119.51, 287,206.95 and 112,628.21 is: 155,428.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,119.51 : 287,206.95 = 112,628.21 : x
  2. Step 2: Convert to fraction form
    208,119.51/287,206.95 = 112,628.21/x
  3. Step 3: Cross multiply
    208,119.51x = 287,206.95 × 112,628.21
  4. Step 4: Simplify right side
    208,119.51x = 32,347,603,242.02
  5. Step 5: Solve for x
    x = 32,347,603,242.02/208,119.51
  6. Step 6: Final answer
    x = 155,428.02

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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.