Home / 89,005.28-122,172.88-78,708.08

Finding the Fourth Proportional to 89,005.28, 122,172.88 and 78,708.08

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Solution

The fourth proportional to 89,005.28, 122,172.88 and 78,708.08 is: 108,038.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,005.28 : 122,172.88 = 78,708.08 : x
  2. Step 2: Convert to fraction form
    89,005.28/122,172.88 = 78,708.08/x
  3. Step 3: Cross multiply
    89,005.28x = 122,172.88 × 78,708.08
  4. Step 4: Simplify right side
    89,005.28x = 9,615,992,812.87
  5. Step 5: Solve for x
    x = 9,615,992,812.87/89,005.28
  6. Step 6: Final answer
    x = 108,038.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.