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Finding the Fourth Proportional to 145,280.40, 200,486.28 and 80,749.32

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Solution

The fourth proportional to 145,280.40, 200,486.28 and 80,749.32 is: 111,433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,280.40 : 200,486.28 = 80,749.32 : x
  2. Step 2: Convert to fraction form
    145,280.40/200,486.28 = 80,749.32/x
  3. Step 3: Cross multiply
    145,280.40x = 200,486.28 × 80,749.32
  4. Step 4: Simplify right side
    145,280.40x = 16,189,130,779.33
  5. Step 5: Solve for x
    x = 16,189,130,779.33/145,280.40
  6. Step 6: Final answer
    x = 111,433.69

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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.