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Finding the Fourth Proportional to 199,545.80, 299,318.70 and 66,430.40

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Solution

The fourth proportional to 199,545.80, 299,318.70 and 66,430.40 is: 99,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,545.80 : 299,318.70 = 66,430.40 : x
  2. Step 2: Convert to fraction form
    199,545.80/299,318.70 = 66,430.40/x
  3. Step 3: Cross multiply
    199,545.80x = 299,318.70 × 66,430.40
  4. Step 4: Simplify right side
    199,545.80x = 19,883,860,968.48
  5. Step 5: Solve for x
    x = 19,883,860,968.48/199,545.80
  6. Step 6: Final answer
    x = 99,645.60

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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.