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Finding the Fourth Proportional to 492,043,460.80, 738,073,064.40 and 128,537,816.80

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Solution

The fourth proportional to 492,043,460.80, 738,073,064.40 and 128,537,816.80 is: 192,808,781.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,043,460.80 : 738,073,064.40 = 128,537,816.80 : x
  2. Step 2: Convert to fraction form
    492,043,460.80/738,073,064.40 = 128,537,816.80/x
  3. Step 3: Cross multiply
    492,043,460.80x = 738,073,064.40 × 128,537,816.80
  4. Step 4: Simplify right side
    492,043,460.80x = 94,870,300,336,861,792
  5. Step 5: Solve for x
    x = 94,870,300,336,861,792/492,043,460.80
  6. Step 6: Final answer
    x = 192,808,781.94

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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.