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Finding the Fourth Proportional to 99,689,958.80, 149,555,155.80 and 56,579,814.80

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Solution

The fourth proportional to 99,689,958.80, 149,555,155.80 and 56,579,814.80 is: 84,881,196.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,689,958.80 : 149,555,155.80 = 56,579,814.80 : x
  2. Step 2: Convert to fraction form
    99,689,958.80/149,555,155.80 = 56,579,814.80/x
  3. Step 3: Cross multiply
    99,689,958.80x = 149,555,155.80 × 56,579,814.80
  4. Step 4: Simplify right side
    99,689,958.80x = 8,461,803,017,549,146
  5. Step 5: Solve for x
    x = 8,461,803,017,549,146/99,689,958.80
  6. Step 6: Final answer
    x = 84,881,196.86

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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.