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Finding the Fourth Proportional to 150,430.72, 207,603.12 and 86,771.20

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Solution

The fourth proportional to 150,430.72, 207,603.12 and 86,771.20 is: 119,749.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,430.72 : 207,603.12 = 86,771.20 : x
  2. Step 2: Convert to fraction form
    150,430.72/207,603.12 = 86,771.20/x
  3. Step 3: Cross multiply
    150,430.72x = 207,603.12 × 86,771.20
  4. Step 4: Simplify right side
    150,430.72x = 18,013,971,846.14
  5. Step 5: Solve for x
    x = 18,013,971,846.14/150,430.72
  6. Step 6: Final answer
    x = 119,749.29

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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.