Home / 128,623.38-177,402.68-112,680.16

Finding the Fourth Proportional to 128,623.38, 177,402.68 and 112,680.16

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Solution

The fourth proportional to 128,623.38, 177,402.68 and 112,680.16 is: 155,413.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,623.38 : 177,402.68 = 112,680.16 : x
  2. Step 2: Convert to fraction form
    128,623.38/177,402.68 = 112,680.16/x
  3. Step 3: Cross multiply
    128,623.38x = 177,402.68 × 112,680.16
  4. Step 4: Simplify right side
    128,623.38x = 19,989,762,366.83
  5. Step 5: Solve for x
    x = 19,989,762,366.83/128,623.38
  6. Step 6: Final answer
    x = 155,413.13

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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.