Home / 128,261.68-192,413.56-39,513.20

Finding the Fourth Proportional to 128,261.68, 192,413.56 and 39,513.20

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Solution

The fourth proportional to 128,261.68, 192,413.56 and 39,513.20 is: 59,276.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,261.68 : 192,413.56 = 39,513.20 : x
  2. Step 2: Convert to fraction form
    128,261.68/192,413.56 = 39,513.20/x
  3. Step 3: Cross multiply
    128,261.68x = 192,413.56 × 39,513.20
  4. Step 4: Simplify right side
    128,261.68x = 7,602,875,478.99
  5. Step 5: Solve for x
    x = 7,602,875,478.99/128,261.68
  6. Step 6: Final answer
    x = 59,276.28

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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.