Home / 85,535,999.40-128,303,999.10-76,876,645.80

Finding the Fourth Proportional to 85,535,999.40, 128,303,999.10 and 76,876,645.80

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Solution

The fourth proportional to 85,535,999.40, 128,303,999.10 and 76,876,645.80 is: 115,314,968.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,535,999.40 : 128,303,999.10 = 76,876,645.80 : x
  2. Step 2: Convert to fraction form
    85,535,999.40/128,303,999.10 = 76,876,645.80/x
  3. Step 3: Cross multiply
    85,535,999.40x = 128,303,999.10 × 76,876,645.80
  4. Step 4: Simplify right side
    85,535,999.40x = 9,863,581,093,534,218
  5. Step 5: Solve for x
    x = 9,863,581,093,534,218/85,535,999.40
  6. Step 6: Final answer
    x = 115,314,968.70

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1.5x scale

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.