Home / 210,623.10-315,934.65-105,428.40

Finding the Fourth Proportional to 210,623.10, 315,934.65 and 105,428.40

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Solution

The fourth proportional to 210,623.10, 315,934.65 and 105,428.40 is: 158,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,623.10 : 315,934.65 = 105,428.40 : x
  2. Step 2: Convert to fraction form
    210,623.10/315,934.65 = 105,428.40/x
  3. Step 3: Cross multiply
    210,623.10x = 315,934.65 × 105,428.40
  4. Step 4: Simplify right side
    210,623.10x = 33,308,484,654.06
  5. Step 5: Solve for x
    x = 33,308,484,654.06/210,623.10
  6. Step 6: Final answer
    x = 158,142.60

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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.