Home / 82,457,999.40-123,686,999.10-78,678,863.40

Finding the Fourth Proportional to 82,457,999.40, 123,686,999.10 and 78,678,863.40

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Solution

The fourth proportional to 82,457,999.40, 123,686,999.10 and 78,678,863.40 is: 118,018,295.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,457,999.40 : 123,686,999.10 = 78,678,863.40 : x
  2. Step 2: Convert to fraction form
    82,457,999.40/123,686,999.10 = 78,678,863.40/x
  3. Step 3: Cross multiply
    82,457,999.40x = 123,686,999.10 × 78,678,863.40
  4. Step 4: Simplify right side
    82,457,999.40x = 9,731,552,506,544,824
  5. Step 5: Solve for x
    x = 9,731,552,506,544,824/82,457,999.40
  6. Step 6: Final answer
    x = 118,018,295.10

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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.