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Finding the Fourth Proportional to 210,519.96, 316,004.64 and 90,636.24

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Solution

The fourth proportional to 210,519.96, 316,004.64 and 90,636.24 is: 136,051.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,519.96 : 316,004.64 = 90,636.24 : x
  2. Step 2: Convert to fraction form
    210,519.96/316,004.64 = 90,636.24/x
  3. Step 3: Cross multiply
    210,519.96x = 316,004.64 × 90,636.24
  4. Step 4: Simplify right side
    210,519.96x = 28,641,472,392.15
  5. Step 5: Solve for x
    x = 28,641,472,392.15/210,519.96
  6. Step 6: Final answer
    x = 136,051.10

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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.