Home / 128,203.40-176,918.10-77,918.60

Finding the Fourth Proportional to 128,203.40, 176,918.10 and 77,918.60

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Solution

The fourth proportional to 128,203.40, 176,918.10 and 77,918.60 is: 107,526.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,203.40 : 176,918.10 = 77,918.60 : x
  2. Step 2: Convert to fraction form
    128,203.40/176,918.10 = 77,918.60/x
  3. Step 3: Cross multiply
    128,203.40x = 176,918.10 × 77,918.60
  4. Step 4: Simplify right side
    128,203.40x = 13,785,210,666.66
  5. Step 5: Solve for x
    x = 13,785,210,666.66/128,203.40
  6. Step 6: Final answer
    x = 107,526.09

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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.