Home / 85,840,090.80-128,768,009.40-28,332,488.40

Finding the Fourth Proportional to 85,840,090.80, 128,768,009.40 and 28,332,488.40

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Solution

The fourth proportional to 85,840,090.80, 128,768,009.40 and 28,332,488.40 is: 42,501,331.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,840,090.80 : 128,768,009.40 = 28,332,488.40 : x
  2. Step 2: Convert to fraction form
    85,840,090.80/128,768,009.40 = 28,332,488.40/x
  3. Step 3: Cross multiply
    85,840,090.80x = 128,768,009.40 × 28,332,488.40
  4. Step 4: Simplify right side
    85,840,090.80x = 3,648,318,132,616,591
  5. Step 5: Solve for x
    x = 3,648,318,132,616,591/85,840,090.80
  6. Step 6: Final answer
    x = 42,501,331.24

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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.