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Finding the Fourth Proportional to 135,430.73, 186,832.37 and 87,699.45

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Solution

The fourth proportional to 135,430.73, 186,832.37 and 87,699.45 is: 120,985.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,430.73 : 186,832.37 = 87,699.45 : x
  2. Step 2: Convert to fraction form
    135,430.73/186,832.37 = 87,699.45/x
  3. Step 3: Cross multiply
    135,430.73x = 186,832.37 × 87,699.45
  4. Step 4: Simplify right side
    135,430.73x = 16,385,095,652.70
  5. Step 5: Solve for x
    x = 16,385,095,652.70/135,430.73
  6. Step 6: Final answer
    x = 120,985.07

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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.