Home / 85,535,130.80-128,289,705.36-28,026,128.72

Finding the Fourth Proportional to 85,535,130.80, 128,289,705.36 and 28,026,128.72

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Solution

The fourth proportional to 85,535,130.80, 128,289,705.36 and 28,026,128.72 is: 42,034,936.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,535,130.80 : 128,289,705.36 = 28,026,128.72 : x
  2. Step 2: Convert to fraction form
    85,535,130.80/128,289,705.36 = 28,026,128.72/x
  3. Step 3: Cross multiply
    85,535,130.80x = 128,289,705.36 × 28,026,128.72
  4. Step 4: Simplify right side
    85,535,130.80x = 3,595,463,795,870,234
  5. Step 5: Solve for x
    x = 3,595,463,795,870,234/85,535,130.80
  6. Step 6: Final answer
    x = 42,034,936.55

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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.