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Finding the Fourth Proportional to 74,706,811.20, 112,060,216.80 and 45,859,406.40

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Solution

The fourth proportional to 74,706,811.20, 112,060,216.80 and 45,859,406.40 is: 68,789,109.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,706,811.20 : 112,060,216.80 = 45,859,406.40 : x
  2. Step 2: Convert to fraction form
    74,706,811.20/112,060,216.80 = 45,859,406.40/x
  3. Step 3: Cross multiply
    74,706,811.20x = 112,060,216.80 × 45,859,406.40
  4. Step 4: Simplify right side
    74,706,811.20x = 5,139,015,023,503,307
  5. Step 5: Solve for x
    x = 5,139,015,023,503,307/74,706,811.20
  6. Step 6: Final answer
    x = 68,789,109.60

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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.