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Finding the Fourth Proportional to 172,495.80, 258,666.90 and 79,030.20

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Solution

The fourth proportional to 172,495.80, 258,666.90 and 79,030.20 is: 118,510.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,495.80 : 258,666.90 = 79,030.20 : x
  2. Step 2: Convert to fraction form
    172,495.80/258,666.90 = 79,030.20/x
  3. Step 3: Cross multiply
    172,495.80x = 258,666.90 × 79,030.20
  4. Step 4: Simplify right side
    172,495.80x = 20,442,496,840.38
  5. Step 5: Solve for x
    x = 20,442,496,840.38/172,495.80
  6. Step 6: Final answer
    x = 118,510.11

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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.