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Finding the Fourth Proportional to 70,692,060.80, 105,963,441.60 and 40,334,556.80

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Solution

The fourth proportional to 70,692,060.80, 105,963,441.60 and 40,334,556.80 is: 60,459,242.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,692,060.80 : 105,963,441.60 = 40,334,556.80 : x
  2. Step 2: Convert to fraction form
    70,692,060.80/105,963,441.60 = 40,334,556.80/x
  3. Step 3: Cross multiply
    70,692,060.80x = 105,963,441.60 × 40,334,556.80
  4. Step 4: Simplify right side
    70,692,060.80x = 4,273,988,453,938,682.50
  5. Step 5: Solve for x
    x = 4,273,988,453,938,682.50/70,692,060.80
  6. Step 6: Final answer
    x = 60,459,242.60

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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.