Home / 85,516,106.30-128,272,956.60-20,820,053.60

Finding the Fourth Proportional to 85,516,106.30, 128,272,956.60 and 20,820,053.60

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Solution

The fourth proportional to 85,516,106.30, 128,272,956.60 and 20,820,053.60 is: 31,229,787.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,516,106.30 : 128,272,956.60 = 20,820,053.60 : x
  2. Step 2: Convert to fraction form
    85,516,106.30/128,272,956.60 = 20,820,053.60/x
  3. Step 3: Cross multiply
    85,516,106.30x = 128,272,956.60 × 20,820,053.60
  4. Step 4: Simplify right side
    85,516,106.30x = 2,670,649,831,842,474
  5. Step 5: Solve for x
    x = 2,670,649,831,842,474/85,516,106.30
  6. Step 6: Final answer
    x = 31,229,787.55

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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.