Home / 115,091.80-172,637.70-99,345.40

Finding the Fourth Proportional to 115,091.80, 172,637.70 and 99,345.40

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Solution

The fourth proportional to 115,091.80, 172,637.70 and 99,345.40 is: 149,018.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,091.80 : 172,637.70 = 99,345.40 : x
  2. Step 2: Convert to fraction form
    115,091.80/172,637.70 = 99,345.40/x
  3. Step 3: Cross multiply
    115,091.80x = 172,637.70 × 99,345.40
  4. Step 4: Simplify right side
    115,091.80x = 17,150,761,361.58
  5. Step 5: Solve for x
    x = 17,150,761,361.58/115,091.80
  6. Step 6: Final answer
    x = 149,018.10

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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.