Home / 53,421.36-79,783.52-45,438.80

Finding the Fourth Proportional to 53,421.36, 79,783.52 and 45,438.80

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Solution

The fourth proportional to 53,421.36, 79,783.52 and 45,438.80 is: 67,861.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,421.36 : 79,783.52 = 45,438.80 : x
  2. Step 2: Convert to fraction form
    53,421.36/79,783.52 = 45,438.80/x
  3. Step 3: Cross multiply
    53,421.36x = 79,783.52 × 45,438.80
  4. Step 4: Simplify right side
    53,421.36x = 3,625,267,408.58
  5. Step 5: Solve for x
    x = 3,625,267,408.58/53,421.36
  6. Step 6: Final answer
    x = 67,861.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.