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Finding the Fourth Proportional to 99,651,679.80, 149,477,519.70 and 90,564,038.70

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Solution

The fourth proportional to 99,651,679.80, 149,477,519.70 and 90,564,038.70 is: 135,846,058.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,651,679.80 : 149,477,519.70 = 90,564,038.70 : x
  2. Step 2: Convert to fraction form
    99,651,679.80/149,477,519.70 = 90,564,038.70/x
  3. Step 3: Cross multiply
    99,651,679.80x = 149,477,519.70 × 90,564,038.70
  4. Step 4: Simplify right side
    99,651,679.80x = 13,537,287,878,890,812
  5. Step 5: Solve for x
    x = 13,537,287,878,890,812/99,651,679.80
  6. Step 6: Final answer
    x = 135,846,058.05

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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.