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Finding the Fourth Proportional to 199,543.80, 299,315.70 and 66,428.40

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Solution

The fourth proportional to 199,543.80, 299,315.70 and 66,428.40 is: 99,642.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,543.80 : 299,315.70 = 66,428.40 : x
  2. Step 2: Convert to fraction form
    199,543.80/299,315.70 = 66,428.40/x
  3. Step 3: Cross multiply
    199,543.80x = 299,315.70 × 66,428.40
  4. Step 4: Simplify right side
    199,543.80x = 19,883,063,045.88
  5. Step 5: Solve for x
    x = 19,883,063,045.88/199,543.80
  6. Step 6: Final answer
    x = 99,642.60

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1.5x scale

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.