Home / 145,715.19-201,090.38-81,188.78

Finding the Fourth Proportional to 145,715.19, 201,090.38 and 81,188.78

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Solution

The fourth proportional to 145,715.19, 201,090.38 and 81,188.78 is: 112,042.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,715.19 : 201,090.38 = 81,188.78 : x
  2. Step 2: Convert to fraction form
    145,715.19/201,090.38 = 81,188.78/x
  3. Step 3: Cross multiply
    145,715.19x = 201,090.38 × 81,188.78
  4. Step 4: Simplify right side
    145,715.19x = 16,326,281,210.54
  5. Step 5: Solve for x
    x = 16,326,281,210.54/145,715.19
  6. Step 6: Final answer
    x = 112,042.41

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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.