Home / 98,078.40-135,358.16-57,804.64

Finding the Fourth Proportional to 98,078.40, 135,358.16 and 57,804.64

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Solution

The fourth proportional to 98,078.40, 135,358.16 and 57,804.64 is: 79,776.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,078.40 : 135,358.16 = 57,804.64 : x
  2. Step 2: Convert to fraction form
    98,078.40/135,358.16 = 57,804.64/x
  3. Step 3: Cross multiply
    98,078.40x = 135,358.16 × 57,804.64
  4. Step 4: Simplify right side
    98,078.40x = 7,824,329,709.86
  5. Step 5: Solve for x
    x = 7,824,329,709.86/98,078.40
  6. Step 6: Final answer
    x = 79,776.28

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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.