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Finding the Fourth Proportional to 128,658.94, 177,454.47 and 88,379.26

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Solution

The fourth proportional to 128,658.94, 177,454.47 and 88,379.26 is: 121,898.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,658.94 : 177,454.47 = 88,379.26 : x
  2. Step 2: Convert to fraction form
    128,658.94/177,454.47 = 88,379.26/x
  3. Step 3: Cross multiply
    128,658.94x = 177,454.47 × 88,379.26
  4. Step 4: Simplify right side
    128,658.94x = 15,683,294,742.29
  5. Step 5: Solve for x
    x = 15,683,294,742.29/128,658.94
  6. Step 6: Final answer
    x = 121,898.21

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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.