Home / 85,551,939.77-128,338,203.02-30,208,387.55

Finding the Fourth Proportional to 85,551,939.77, 128,338,203.02 and 30,208,387.55

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Solution

The fourth proportional to 85,551,939.77, 128,338,203.02 and 30,208,387.55 is: 45,316,215.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,551,939.77 : 128,338,203.02 = 30,208,387.55 : x
  2. Step 2: Convert to fraction form
    85,551,939.77/128,338,203.02 = 30,208,387.55/x
  3. Step 3: Cross multiply
    85,551,939.77x = 128,338,203.02 × 30,208,387.55
  4. Step 4: Simplify right side
    85,551,939.77x = 3,876,890,173,506,007.50
  5. Step 5: Solve for x
    x = 3,876,890,173,506,007.50/85,551,939.77
  6. Step 6: Final answer
    x = 45,316,215.91

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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.