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Finding the Fourth Proportional to 172,465,369.80, 258,698,054.70 and 155,459,257.80

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Solution

The fourth proportional to 172,465,369.80, 258,698,054.70 and 155,459,257.80 is: 233,188,886.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,465,369.80 : 258,698,054.70 = 155,459,257.80 : x
  2. Step 2: Convert to fraction form
    172,465,369.80/258,698,054.70 = 155,459,257.80/x
  3. Step 3: Cross multiply
    172,465,369.80x = 258,698,054.70 × 155,459,257.80
  4. Step 4: Simplify right side
    172,465,369.80x = 40,217,007,577,965,800
  5. Step 5: Solve for x
    x = 40,217,007,577,965,800/172,465,369.80
  6. Step 6: Final answer
    x = 233,188,886.70

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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.