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Finding the Fourth Proportional to 99,672,859.80, 149,509,289.70 and 61,209,653.40

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Solution

The fourth proportional to 99,672,859.80, 149,509,289.70 and 61,209,653.40 is: 91,814,480.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,672,859.80 : 149,509,289.70 = 61,209,653.40 : x
  2. Step 2: Convert to fraction form
    99,672,859.80/149,509,289.70 = 61,209,653.40/x
  3. Step 3: Cross multiply
    99,672,859.80x = 149,509,289.70 × 61,209,653.40
  4. Step 4: Simplify right side
    99,672,859.80x = 9,151,411,802,617,190
  5. Step 5: Solve for x
    x = 9,151,411,802,617,190/99,672,859.80
  6. Step 6: Final answer
    x = 91,814,480.10

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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.