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Finding the Fourth Proportional to 139,973,368.80, 209,592,637.20 and 98,810,529.60

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Solution

The fourth proportional to 139,973,368.80, 209,592,637.20 and 98,810,529.60 is: 147,956,426.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,973,368.80 : 209,592,637.20 = 98,810,529.60 : x
  2. Step 2: Convert to fraction form
    139,973,368.80/209,592,637.20 = 98,810,529.60/x
  3. Step 3: Cross multiply
    139,973,368.80x = 209,592,637.20 × 98,810,529.60
  4. Step 4: Simplify right side
    139,973,368.80x = 20,709,959,481,992,660
  5. Step 5: Solve for x
    x = 20,709,959,481,992,660/139,973,368.80
  6. Step 6: Final answer
    x = 147,956,426.71

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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.