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Finding the Fourth Proportional to 91,031,605.80, 136,547,408.70 and 91,031,605.80

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Solution

The fourth proportional to 91,031,605.80, 136,547,408.70 and 91,031,605.80 is: 136,547,408.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,031,605.80 : 136,547,408.70 = 91,031,605.80 : x
  2. Step 2: Convert to fraction form
    91,031,605.80/136,547,408.70 = 91,031,605.80/x
  3. Step 3: Cross multiply
    91,031,605.80x = 136,547,408.70 × 91,031,605.80
  4. Step 4: Simplify right side
    91,031,605.80x = 12,430,129,881,789,888
  5. Step 5: Solve for x
    x = 12,430,129,881,789,888/91,031,605.80
  6. Step 6: Final answer
    x = 136,547,408.70

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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.