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Finding the Fourth Proportional to 139,871,995.20, 209,807,992.80 and 130,914,043.20

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Solution

The fourth proportional to 139,871,995.20, 209,807,992.80 and 130,914,043.20 is: 196,371,064.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,871,995.20 : 209,807,992.80 = 130,914,043.20 : x
  2. Step 2: Convert to fraction form
    139,871,995.20/209,807,992.80 = 130,914,043.20/x
  3. Step 3: Cross multiply
    139,871,995.20x = 209,807,992.80 × 130,914,043.20
  4. Step 4: Simplify right side
    139,871,995.20x = 27,466,812,633,124,492
  5. Step 5: Solve for x
    x = 27,466,812,633,124,492/139,871,995.20
  6. Step 6: Final answer
    x = 196,371,064.80

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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.