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Finding the Fourth Proportional to 128,013.96, 176,655.60 and 71,424.12

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Solution

The fourth proportional to 128,013.96, 176,655.60 and 71,424.12 is: 98,563.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,013.96 : 176,655.60 = 71,424.12 : x
  2. Step 2: Convert to fraction form
    128,013.96/176,655.60 = 71,424.12/x
  3. Step 3: Cross multiply
    128,013.96x = 176,655.60 × 71,424.12
  4. Step 4: Simplify right side
    128,013.96x = 12,617,470,773.07
  5. Step 5: Solve for x
    x = 12,617,470,773.07/128,013.96
  6. Step 6: Final answer
    x = 98,563.24

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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.