Home / 145,642.16-200,975.90-81,109.46

Finding the Fourth Proportional to 145,642.16, 200,975.90 and 81,109.46

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Solution

The fourth proportional to 145,642.16, 200,975.90 and 81,109.46 is: 111,925.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,642.16 : 200,975.90 = 81,109.46 : x
  2. Step 2: Convert to fraction form
    145,642.16/200,975.90 = 81,109.46/x
  3. Step 3: Cross multiply
    145,642.16x = 200,975.90 × 81,109.46
  4. Step 4: Simplify right side
    145,642.16x = 16,301,045,311.59
  5. Step 5: Solve for x
    x = 16,301,045,311.59/145,642.16
  6. Step 6: Final answer
    x = 111,925.32

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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.