Home / 98,128.72-135,435.36-57,840.16

Finding the Fourth Proportional to 98,128.72, 135,435.36 and 57,840.16

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Solution

The fourth proportional to 98,128.72, 135,435.36 and 57,840.16 is: 79,829.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,128.72 : 135,435.36 = 57,840.16 : x
  2. Step 2: Convert to fraction form
    98,128.72/135,435.36 = 57,840.16/x
  3. Step 3: Cross multiply
    98,128.72x = 135,435.36 × 57,840.16
  4. Step 4: Simplify right side
    98,128.72x = 7,833,602,892.06
  5. Step 5: Solve for x
    x = 7,833,602,892.06/98,128.72
  6. Step 6: Final answer
    x = 79,829.87

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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.