Home / 85,541,999.10-128,312,998.65-28,020,399.90

Finding the Fourth Proportional to 85,541,999.10, 128,312,998.65 and 28,020,399.90

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Solution

The fourth proportional to 85,541,999.10, 128,312,998.65 and 28,020,399.90 is: 42,030,599.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,541,999.10 : 128,312,998.65 = 28,020,399.90 : x
  2. Step 2: Convert to fraction form
    85,541,999.10/128,312,998.65 = 28,020,399.90/x
  3. Step 3: Cross multiply
    85,541,999.10x = 128,312,998.65 × 28,020,399.90
  4. Step 4: Simplify right side
    85,541,999.10x = 3,595,381,534,541,160
  5. Step 5: Solve for x
    x = 3,595,381,534,541,160/85,541,999.10
  6. Step 6: Final answer
    x = 42,030,599.85

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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.