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Finding the Fourth Proportional to 139,071,502.80, 208,607,254.20 and 102,791,797.20

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Solution

The fourth proportional to 139,071,502.80, 208,607,254.20 and 102,791,797.20 is: 154,187,695.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,071,502.80 : 208,607,254.20 = 102,791,797.20 : x
  2. Step 2: Convert to fraction form
    139,071,502.80/208,607,254.20 = 102,791,797.20/x
  3. Step 3: Cross multiply
    139,071,502.80x = 208,607,254.20 × 102,791,797.20
  4. Step 4: Simplify right side
    139,071,502.80x = 21,443,114,568,175,248
  5. Step 5: Solve for x
    x = 21,443,114,568,175,248/139,071,502.80
  6. Step 6: Final answer
    x = 154,187,695.80

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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.