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Finding the Fourth Proportional to 207,030.20, 310,545.30 and 172,038.20

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Solution

The fourth proportional to 207,030.20, 310,545.30 and 172,038.20 is: 258,057.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,030.20 : 310,545.30 = 172,038.20 : x
  2. Step 2: Convert to fraction form
    207,030.20/310,545.30 = 172,038.20/x
  3. Step 3: Cross multiply
    207,030.20x = 310,545.30 × 172,038.20
  4. Step 4: Simplify right side
    207,030.20x = 53,425,654,430.46
  5. Step 5: Solve for x
    x = 53,425,654,430.46/207,030.20
  6. Step 6: Final answer
    x = 258,057.30

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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.