Home / 135,802.72-187,430.95-78,431.73

Finding the Fourth Proportional to 135,802.72, 187,430.95 and 78,431.73

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Solution

The fourth proportional to 135,802.72, 187,430.95 and 78,431.73 is: 108,249.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,802.72 : 187,430.95 = 78,431.73 : x
  2. Step 2: Convert to fraction form
    135,802.72/187,430.95 = 78,431.73/x
  3. Step 3: Cross multiply
    135,802.72x = 187,430.95 × 78,431.73
  4. Step 4: Simplify right side
    135,802.72x = 14,700,533,467.96
  5. Step 5: Solve for x
    x = 14,700,533,467.96/135,802.72
  6. Step 6: Final answer
    x = 108,249.18

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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.