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Finding the Fourth Proportional to 93,312,870.80, 139,969,306.20 and 85,376,685.20

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Solution

The fourth proportional to 93,312,870.80, 139,969,306.20 and 85,376,685.20 is: 128,065,027.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,312,870.80 : 139,969,306.20 = 85,376,685.20 : x
  2. Step 2: Convert to fraction form
    93,312,870.80/139,969,306.20 = 85,376,685.20/x
  3. Step 3: Cross multiply
    93,312,870.80x = 139,969,306.20 × 85,376,685.20
  4. Step 4: Simplify right side
    93,312,870.80x = 11,950,115,393,099,808
  5. Step 5: Solve for x
    x = 11,950,115,393,099,808/93,312,870.80
  6. Step 6: Final answer
    x = 128,065,027.80

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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.