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Finding the Fourth Proportional to 210,089.65, 315,134.30 and 76,980.32

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Solution

The fourth proportional to 210,089.65, 315,134.30 and 76,980.32 is: 115,470.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,089.65 : 315,134.30 = 76,980.32 : x
  2. Step 2: Convert to fraction form
    210,089.65/315,134.30 = 76,980.32/x
  3. Step 3: Cross multiply
    210,089.65x = 315,134.30 × 76,980.32
  4. Step 4: Simplify right side
    210,089.65x = 24,259,140,395.13
  5. Step 5: Solve for x
    x = 24,259,140,395.13/210,089.65
  6. Step 6: Final answer
    x = 115,470.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.