Home / 85,904,523.12-128,857,050.81-21,208,335.60

Finding the Fourth Proportional to 85,904,523.12, 128,857,050.81 and 21,208,335.60

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Solution

The fourth proportional to 85,904,523.12, 128,857,050.81 and 21,208,335.60 is: 31,812,569.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,904,523.12 : 128,857,050.81 = 21,208,335.60 : x
  2. Step 2: Convert to fraction form
    85,904,523.12/128,857,050.81 = 21,208,335.60/x
  3. Step 3: Cross multiply
    85,904,523.12x = 128,857,050.81 × 21,208,335.60
  4. Step 4: Simplify right side
    85,904,523.12x = 2,732,843,578,004,732
  5. Step 5: Solve for x
    x = 2,732,843,578,004,732/85,904,523.12
  6. Step 6: Final answer
    x = 31,812,569.10

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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.