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Finding the Fourth Proportional to 114,957,739.80, 172,436,609.70 and 78,678,034.20

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Solution

The fourth proportional to 114,957,739.80, 172,436,609.70 and 78,678,034.20 is: 118,017,051.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,957,739.80 : 172,436,609.70 = 78,678,034.20 : x
  2. Step 2: Convert to fraction form
    114,957,739.80/172,436,609.70 = 78,678,034.20/x
  3. Step 3: Cross multiply
    114,957,739.80x = 172,436,609.70 × 78,678,034.20
  4. Step 4: Simplify right side
    114,957,739.80x = 13,566,973,475,308,652
  5. Step 5: Solve for x
    x = 13,566,973,475,308,652/114,957,739.80
  6. Step 6: Final answer
    x = 118,017,051.30

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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.