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Finding the Fourth Proportional to 57,990,900.40, 86,986,350.60 and 38,880,602.80

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Solution

The fourth proportional to 57,990,900.40, 86,986,350.60 and 38,880,602.80 is: 58,320,904.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,990,900.40 : 86,986,350.60 = 38,880,602.80 : x
  2. Step 2: Convert to fraction form
    57,990,900.40/86,986,350.60 = 38,880,602.80/x
  3. Step 3: Cross multiply
    57,990,900.40x = 86,986,350.60 × 38,880,602.80
  4. Step 4: Simplify right side
    57,990,900.40x = 3,382,081,746,700,141
  5. Step 5: Solve for x
    x = 3,382,081,746,700,141/57,990,900.40
  6. Step 6: Final answer
    x = 58,320,904.20

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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.