Home / 128,823.40-193,331.10-66,461.80

Finding the Fourth Proportional to 128,823.40, 193,331.10 and 66,461.80

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Solution

The fourth proportional to 128,823.40, 193,331.10 and 66,461.80 is: 99,742.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,823.40 : 193,331.10 = 66,461.80 : x
  2. Step 2: Convert to fraction form
    128,823.40/193,331.10 = 66,461.80/x
  3. Step 3: Cross multiply
    128,823.40x = 193,331.10 × 66,461.80
  4. Step 4: Simplify right side
    128,823.40x = 12,849,132,901.98
  5. Step 5: Solve for x
    x = 12,849,132,901.98/128,823.40
  6. Step 6: Final answer
    x = 99,742.23

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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.