Home / 85,810,020.40-128,715,030.60-76,404,170.80

Finding the Fourth Proportional to 85,810,020.40, 128,715,030.60 and 76,404,170.80

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Solution

The fourth proportional to 85,810,020.40, 128,715,030.60 and 76,404,170.80 is: 114,606,256.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,810,020.40 : 128,715,030.60 = 76,404,170.80 : x
  2. Step 2: Convert to fraction form
    85,810,020.40/128,715,030.60 = 76,404,170.80/x
  3. Step 3: Cross multiply
    85,810,020.40x = 128,715,030.60 × 76,404,170.80
  4. Step 4: Simplify right side
    85,810,020.40x = 9,834,365,182,489,626
  5. Step 5: Solve for x
    x = 9,834,365,182,489,626/85,810,020.40
  6. Step 6: Final answer
    x = 114,606,256.20

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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.