Home / 145,109.78-200,240.50-81,435.26

Finding the Fourth Proportional to 145,109.78, 200,240.50 and 81,435.26

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Solution

The fourth proportional to 145,109.78, 200,240.50 and 81,435.26 is: 112,374.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,109.78 : 200,240.50 = 81,435.26 : x
  2. Step 2: Convert to fraction form
    145,109.78/200,240.50 = 81,435.26/x
  3. Step 3: Cross multiply
    145,109.78x = 200,240.50 × 81,435.26
  4. Step 4: Simplify right side
    145,109.78x = 16,306,637,180.03
  5. Step 5: Solve for x
    x = 16,306,637,180.03/145,109.78
  6. Step 6: Final answer
    x = 112,374.49

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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.