Home / 208,173,529.80-312,036,345.90-78,731,123.40

Finding the Fourth Proportional to 208,173,529.80, 312,036,345.90 and 78,731,123.40

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Solution

The fourth proportional to 208,173,529.80, 312,036,345.90 and 78,731,123.40 is: 118,011,987.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,173,529.80 : 312,036,345.90 = 78,731,123.40 : x
  2. Step 2: Convert to fraction form
    208,173,529.80/312,036,345.90 = 78,731,123.40/x
  3. Step 3: Cross multiply
    208,173,529.80x = 312,036,345.90 × 78,731,123.40
  4. Step 4: Simplify right side
    208,173,529.80x = 24,566,972,054,337,984
  5. Step 5: Solve for x
    x = 24,566,972,054,337,984/208,173,529.80
  6. Step 6: Final answer
    x = 118,011,987.78

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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.