Home / 145,125.60-200,315.07-87,765

Finding the Fourth Proportional to 145,125.60, 200,315.07 and 87,765

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Solution

The fourth proportional to 145,125.60, 200,315.07 and 87,765 is: 121,140.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,125.60 : 200,315.07 = 87,765 : x
  2. Step 2: Convert to fraction form
    145,125.60/200,315.07 = 87,765/x
  3. Step 3: Cross multiply
    145,125.60x = 200,315.07 × 87,765
  4. Step 4: Simplify right side
    145,125.60x = 17,580,652,118.55
  5. Step 5: Solve for x
    x = 17,580,652,118.55/145,125.60
  6. Step 6: Final answer
    x = 121,140.94

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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.