Home / 85,936,457.37-128,903,410.28-21,240,258.87

Finding the Fourth Proportional to 85,936,457.37, 128,903,410.28 and 21,240,258.87

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Solution

The fourth proportional to 85,936,457.37, 128,903,410.28 and 21,240,258.87 is: 31,860,072.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,936,457.37 : 128,903,410.28 = 21,240,258.87 : x
  2. Step 2: Convert to fraction form
    85,936,457.37/128,903,410.28 = 21,240,258.87/x
  3. Step 3: Cross multiply
    85,936,457.37x = 128,903,410.28 × 21,240,258.87
  4. Step 4: Simplify right side
    85,936,457.37x = 2,737,941,803,466,818
  5. Step 5: Solve for x
    x = 2,737,941,803,466,818/85,936,457.37
  6. Step 6: Final answer
    x = 31,860,072.98

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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.