Home / 72,115.04-98,989.07-63,979.40

Finding the Fourth Proportional to 72,115.04, 98,989.07 and 63,979.40

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Solution

The fourth proportional to 72,115.04, 98,989.07 and 63,979.40 is: 87,821.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,115.04 : 98,989.07 = 63,979.40 : x
  2. Step 2: Convert to fraction form
    72,115.04/98,989.07 = 63,979.40/x
  3. Step 3: Cross multiply
    72,115.04x = 98,989.07 × 63,979.40
  4. Step 4: Simplify right side
    72,115.04x = 6,333,261,592.62
  5. Step 5: Solve for x
    x = 6,333,261,592.62/72,115.04
  6. Step 6: Final answer
    x = 87,821.64

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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.