Home / 78,225.20-117,078.60-72,004.40

Finding the Fourth Proportional to 78,225.20, 117,078.60 and 72,004.40

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Solution

The fourth proportional to 78,225.20, 117,078.60 and 72,004.40 is: 107,768.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,225.20 : 117,078.60 = 72,004.40 : x
  2. Step 2: Convert to fraction form
    78,225.20/117,078.60 = 72,004.40/x
  3. Step 3: Cross multiply
    78,225.20x = 117,078.60 × 72,004.40
  4. Step 4: Simplify right side
    78,225.20x = 8,430,174,345.84
  5. Step 5: Solve for x
    x = 8,430,174,345.84/78,225.20
  6. Step 6: Final answer
    x = 107,768.01

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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.