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Finding the Fourth Proportional to 191,808,687.80, 287,713,031.70 and 130,586,684.60

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Solution

The fourth proportional to 191,808,687.80, 287,713,031.70 and 130,586,684.60 is: 195,880,026.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,808,687.80 : 287,713,031.70 = 130,586,684.60 : x
  2. Step 2: Convert to fraction form
    191,808,687.80/287,713,031.70 = 130,586,684.60/x
  3. Step 3: Cross multiply
    191,808,687.80x = 287,713,031.70 × 130,586,684.60
  4. Step 4: Simplify right side
    191,808,687.80x = 37,571,490,925,917,696
  5. Step 5: Solve for x
    x = 37,571,490,925,917,696/191,808,687.80
  6. Step 6: Final answer
    x = 195,880,026.90

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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.