Home / 100,340.04-138,457.98-57,912.60

Finding the Fourth Proportional to 100,340.04, 138,457.98 and 57,912.60

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Solution

The fourth proportional to 100,340.04, 138,457.98 and 57,912.60 is: 79,912.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,340.04 : 138,457.98 = 57,912.60 : x
  2. Step 2: Convert to fraction form
    100,340.04/138,457.98 = 57,912.60/x
  3. Step 3: Cross multiply
    100,340.04x = 138,457.98 × 57,912.60
  4. Step 4: Simplify right side
    100,340.04x = 8,018,461,612.55
  5. Step 5: Solve for x
    x = 8,018,461,612.55/100,340.04
  6. Step 6: Final answer
    x = 79,912.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.