Home / 128,328.50-192,428.49-39,570.47

Finding the Fourth Proportional to 128,328.50, 192,428.49 and 39,570.47

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Solution

The fourth proportional to 128,328.50, 192,428.49 and 39,570.47 is: 59,335.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,328.50 : 192,428.49 = 39,570.47 : x
  2. Step 2: Convert to fraction form
    128,328.50/192,428.49 = 39,570.47/x
  3. Step 3: Cross multiply
    128,328.50x = 192,428.49 × 39,570.47
  4. Step 4: Simplify right side
    128,328.50x = 7,614,484,828.55
  5. Step 5: Solve for x
    x = 7,614,484,828.55/128,328.50
  6. Step 6: Final answer
    x = 59,335.89

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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.