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Finding the Fourth Proportional to 128,426.96, 177,189.03 and 77,455.28

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Solution

The fourth proportional to 128,426.96, 177,189.03 and 77,455.28 is: 106,864.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,426.96 : 177,189.03 = 77,455.28 : x
  2. Step 2: Convert to fraction form
    128,426.96/177,189.03 = 77,455.28/x
  3. Step 3: Cross multiply
    128,426.96x = 177,189.03 × 77,455.28
  4. Step 4: Simplify right side
    128,426.96x = 13,724,225,045.63
  5. Step 5: Solve for x
    x = 13,724,225,045.63/128,426.96
  6. Step 6: Final answer
    x = 106,864.05

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.