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Finding the Fourth Proportional to 230,710.70, 318,379.73 and 128,730.22

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Solution

The fourth proportional to 230,710.70, 318,379.73 and 128,730.22 is: 177,647.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,710.70 : 318,379.73 = 128,730.22 : x
  2. Step 2: Convert to fraction form
    230,710.70/318,379.73 = 128,730.22/x
  3. Step 3: Cross multiply
    230,710.70x = 318,379.73 × 128,730.22
  4. Step 4: Simplify right side
    230,710.70x = 40,985,091,246.84
  5. Step 5: Solve for x
    x = 40,985,091,246.84/230,710.70
  6. Step 6: Final answer
    x = 177,647.12

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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.