Home / 145,130.47-200,285.01-80,600.72

Finding the Fourth Proportional to 145,130.47, 200,285.01 and 80,600.72

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Solution

The fourth proportional to 145,130.47, 200,285.01 and 80,600.72 is: 111,231.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,130.47 : 200,285.01 = 80,600.72 : x
  2. Step 2: Convert to fraction form
    145,130.47/200,285.01 = 80,600.72/x
  3. Step 3: Cross multiply
    145,130.47x = 200,285.01 × 80,600.72
  4. Step 4: Simplify right side
    145,130.47x = 16,143,115,009.78
  5. Step 5: Solve for x
    x = 16,143,115,009.78/145,130.47
  6. Step 6: Final answer
    x = 111,231.74

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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.