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Finding the Fourth Proportional to 210,424.20, 315,636.30 and 105,205.20

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Solution

The fourth proportional to 210,424.20, 315,636.30 and 105,205.20 is: 157,807.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,424.20 : 315,636.30 = 105,205.20 : x
  2. Step 2: Convert to fraction form
    210,424.20/315,636.30 = 105,205.20/x
  3. Step 3: Cross multiply
    210,424.20x = 315,636.30 × 105,205.20
  4. Step 4: Simplify right side
    210,424.20x = 33,206,580,068.76
  5. Step 5: Solve for x
    x = 33,206,580,068.76/210,424.20
  6. Step 6: Final answer
    x = 157,807.80

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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.