Home / 145,880.75-201,315.44-78,812.75

Finding the Fourth Proportional to 145,880.75, 201,315.44 and 78,812.75

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Solution

The fourth proportional to 145,880.75, 201,315.44 and 78,812.75 is: 108,761.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,880.75 : 201,315.44 = 78,812.75 : x
  2. Step 2: Convert to fraction form
    145,880.75/201,315.44 = 78,812.75/x
  3. Step 3: Cross multiply
    145,880.75x = 201,315.44 × 78,812.75
  4. Step 4: Simplify right side
    145,880.75x = 15,866,223,443.86
  5. Step 5: Solve for x
    x = 15,866,223,443.86/145,880.75
  6. Step 6: Final answer
    x = 108,761.60

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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.