Home / 145,749.69-201,140.82-81,219.02

Finding the Fourth Proportional to 145,749.69, 201,140.82 and 81,219.02

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Solution

The fourth proportional to 145,749.69, 201,140.82 and 81,219.02 is: 112,085.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,749.69 : 201,140.82 = 81,219.02 : x
  2. Step 2: Convert to fraction form
    145,749.69/201,140.82 = 81,219.02/x
  3. Step 3: Cross multiply
    145,749.69x = 201,140.82 × 81,219.02
  4. Step 4: Simplify right side
    145,749.69x = 16,336,459,559.55
  5. Step 5: Solve for x
    x = 16,336,459,559.55/145,749.69
  6. Step 6: Final answer
    x = 112,085.72

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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.