Home / 105,408.48-145,287.60-87,445.92

Finding the Fourth Proportional to 105,408.48, 145,287.60 and 87,445.92

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Solution

The fourth proportional to 105,408.48, 145,287.60 and 87,445.92 is: 120,529.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,408.48 : 145,287.60 = 87,445.92 : x
  2. Step 2: Convert to fraction form
    105,408.48/145,287.60 = 87,445.92/x
  3. Step 3: Cross multiply
    105,408.48x = 145,287.60 × 87,445.92
  4. Step 4: Simplify right side
    105,408.48x = 12,704,807,846.59
  5. Step 5: Solve for x
    x = 12,704,807,846.59/105,408.48
  6. Step 6: Final answer
    x = 120,529.28

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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.