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Finding the Fourth Proportional to 172,369,871.60, 258,554,807.40 and 70,207,228.40

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Solution

The fourth proportional to 172,369,871.60, 258,554,807.40 and 70,207,228.40 is: 105,310,842.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,369,871.60 : 258,554,807.40 = 70,207,228.40 : x
  2. Step 2: Convert to fraction form
    172,369,871.60/258,554,807.40 = 70,207,228.40/x
  3. Step 3: Cross multiply
    172,369,871.60x = 258,554,807.40 × 70,207,228.40
  4. Step 4: Simplify right side
    172,369,871.60x = 18,152,416,417,049,812
  5. Step 5: Solve for x
    x = 18,152,416,417,049,812/172,369,871.60
  6. Step 6: Final answer
    x = 105,310,842.60

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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.