Home / 280,901.69-421,394.55-103,395.18

Finding the Fourth Proportional to 280,901.69, 421,394.55 and 103,395.18

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Solution

The fourth proportional to 280,901.69, 421,394.55 and 103,395.18 is: 155,108.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,901.69 : 421,394.55 = 103,395.18 : x
  2. Step 2: Convert to fraction form
    280,901.69/421,394.55 = 103,395.18/x
  3. Step 3: Cross multiply
    280,901.69x = 421,394.55 × 103,395.18
  4. Step 4: Simplify right side
    280,901.69x = 43,570,164,831.29
  5. Step 5: Solve for x
    x = 43,570,164,831.29/280,901.69
  6. Step 6: Final answer
    x = 155,108.24

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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.