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Finding the Fourth Proportional to 99,651,646.80, 149,477,470.20 and 74,142,478.80

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Solution

The fourth proportional to 99,651,646.80, 149,477,470.20 and 74,142,478.80 is: 111,213,718.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,651,646.80 : 149,477,470.20 = 74,142,478.80 : x
  2. Step 2: Convert to fraction form
    99,651,646.80/149,477,470.20 = 74,142,478.80/x
  3. Step 3: Cross multiply
    99,651,646.80x = 149,477,470.20 × 74,142,478.80
  4. Step 4: Simplify right side
    99,651,646.80x = 11,082,630,165,381,130
  5. Step 5: Solve for x
    x = 11,082,630,165,381,130/99,651,646.80
  6. Step 6: Final answer
    x = 111,213,718.20

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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.