Home / 128,173.18-192,281.63-39,424.72

Finding the Fourth Proportional to 128,173.18, 192,281.63 and 39,424.72

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Solution

The fourth proportional to 128,173.18, 192,281.63 and 39,424.72 is: 59,143.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,173.18 : 192,281.63 = 39,424.72 : x
  2. Step 2: Convert to fraction form
    128,173.18/192,281.63 = 39,424.72/x
  3. Step 3: Cross multiply
    128,173.18x = 192,281.63 × 39,424.72
  4. Step 4: Simplify right side
    128,173.18x = 7,580,648,462.49
  5. Step 5: Solve for x
    x = 7,580,648,462.49/128,173.18
  6. Step 6: Final answer
    x = 59,143.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.