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Finding the Fourth Proportional to 139,968,592.80, 209,952,889.20 and 105,480,477.60

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Solution

The fourth proportional to 139,968,592.80, 209,952,889.20 and 105,480,477.60 is: 158,220,716.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,592.80 : 209,952,889.20 = 105,480,477.60 : x
  2. Step 2: Convert to fraction form
    139,968,592.80/209,952,889.20 = 105,480,477.60/x
  3. Step 3: Cross multiply
    139,968,592.80x = 209,952,889.20 × 105,480,477.60
  4. Step 4: Simplify right side
    139,968,592.80x = 22,145,931,026,315,880
  5. Step 5: Solve for x
    x = 22,145,931,026,315,880/139,968,592.80
  6. Step 6: Final answer
    x = 158,220,716.40

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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.