Home / 128,171.81-176,892.13-77,210.27

Finding the Fourth Proportional to 128,171.81, 176,892.13 and 77,210.27

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Solution

The fourth proportional to 128,171.81, 176,892.13 and 77,210.27 is: 106,559.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,171.81 : 176,892.13 = 77,210.27 : x
  2. Step 2: Convert to fraction form
    128,171.81/176,892.13 = 77,210.27/x
  3. Step 3: Cross multiply
    128,171.81x = 176,892.13 × 77,210.27
  4. Step 4: Simplify right side
    128,171.81x = 13,657,888,061.76
  5. Step 5: Solve for x
    x = 13,657,888,061.76/128,171.81
  6. Step 6: Final answer
    x = 106,559.22

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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.