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Finding the Fourth Proportional to 56,376,434.30, 78,756,946.90 and 56,376,434.30

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Solution

The fourth proportional to 56,376,434.30, 78,756,946.90 and 56,376,434.30 is: 78,756,946.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,376,434.30 : 78,756,946.90 = 56,376,434.30 : x
  2. Step 2: Convert to fraction form
    56,376,434.30/78,756,946.90 = 56,376,434.30/x
  3. Step 3: Cross multiply
    56,376,434.30x = 78,756,946.90 × 56,376,434.30
  4. Step 4: Simplify right side
    56,376,434.30x = 4,440,035,842,576,439
  5. Step 5: Solve for x
    x = 4,440,035,842,576,439/56,376,434.30
  6. Step 6: Final answer
    x = 78,756,946.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.