Home / 82,458,045.90-123,687,068.85-78,678,909.90

Finding the Fourth Proportional to 82,458,045.90, 123,687,068.85 and 78,678,909.90

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Solution

The fourth proportional to 82,458,045.90, 123,687,068.85 and 78,678,909.90 is: 118,018,364.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,458,045.90 : 123,687,068.85 = 78,678,909.90 : x
  2. Step 2: Convert to fraction form
    82,458,045.90/123,687,068.85 = 78,678,909.90/x
  3. Step 3: Cross multiply
    82,458,045.90x = 123,687,068.85 × 78,678,909.90
  4. Step 4: Simplify right side
    82,458,045.90x = 9,731,563,745,844,246
  5. Step 5: Solve for x
    x = 9,731,563,745,844,246/82,458,045.90
  6. Step 6: Final answer
    x = 118,018,364.85

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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.