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Finding the Fourth Proportional to 78,990.98, 118,473.62 and 26,400.38

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Solution

The fourth proportional to 78,990.98, 118,473.62 and 26,400.38 is: 39,596.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,990.98 : 118,473.62 = 26,400.38 : x
  2. Step 2: Convert to fraction form
    78,990.98/118,473.62 = 26,400.38/x
  3. Step 3: Cross multiply
    78,990.98x = 118,473.62 × 26,400.38
  4. Step 4: Simplify right side
    78,990.98x = 3,127,748,587.98
  5. Step 5: Solve for x
    x = 3,127,748,587.98/78,990.98
  6. Step 6: Final answer
    x = 39,596.28

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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.