Home / 78,678,000.30-118,017,000.45-77,166,345.90

Finding the Fourth Proportional to 78,678,000.30, 118,017,000.45 and 77,166,345.90

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Solution

The fourth proportional to 78,678,000.30, 118,017,000.45 and 77,166,345.90 is: 115,749,518.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,678,000.30 : 118,017,000.45 = 77,166,345.90 : x
  2. Step 2: Convert to fraction form
    78,678,000.30/118,017,000.45 = 77,166,345.90/x
  3. Step 3: Cross multiply
    78,678,000.30x = 118,017,000.45 × 77,166,345.90
  4. Step 4: Simplify right side
    78,678,000.30x = 9,106,940,678,805,156
  5. Step 5: Solve for x
    x = 9,106,940,678,805,156/78,678,000.30
  6. Step 6: Final answer
    x = 115,749,518.85

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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.