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Finding the Fourth Proportional to 210,019.70, 315,029.55 and 76,904.30

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Solution

The fourth proportional to 210,019.70, 315,029.55 and 76,904.30 is: 115,356.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,019.70 : 315,029.55 = 76,904.30 : x
  2. Step 2: Convert to fraction form
    210,019.70/315,029.55 = 76,904.30/x
  3. Step 3: Cross multiply
    210,019.70x = 315,029.55 × 76,904.30
  4. Step 4: Simplify right side
    210,019.70x = 24,227,127,022.07
  5. Step 5: Solve for x
    x = 24,227,127,022.07/210,019.70
  6. Step 6: Final answer
    x = 115,356.45

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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.