Home / 145,022.13-200,133.99-81,364.64

Finding the Fourth Proportional to 145,022.13, 200,133.99 and 81,364.64

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Solution

The fourth proportional to 145,022.13, 200,133.99 and 81,364.64 is: 112,285.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,022.13 : 200,133.99 = 81,364.64 : x
  2. Step 2: Convert to fraction form
    145,022.13/200,133.99 = 81,364.64/x
  3. Step 3: Cross multiply
    145,022.13x = 200,133.99 × 81,364.64
  4. Step 4: Simplify right side
    145,022.13x = 16,283,829,047.44
  5. Step 5: Solve for x
    x = 16,283,829,047.44/145,022.13
  6. Step 6: Final answer
    x = 112,285.13

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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.