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Finding the Fourth Proportional to 103,810.40, 155,715.60 and 70,632.80

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Solution

The fourth proportional to 103,810.40, 155,715.60 and 70,632.80 is: 105,949.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,810.40 : 155,715.60 = 70,632.80 : x
  2. Step 2: Convert to fraction form
    103,810.40/155,715.60 = 70,632.80/x
  3. Step 3: Cross multiply
    103,810.40x = 155,715.60 × 70,632.80
  4. Step 4: Simplify right side
    103,810.40x = 10,998,628,831.68
  5. Step 5: Solve for x
    x = 10,998,628,831.68/103,810.40
  6. Step 6: Final answer
    x = 105,949.20

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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.