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Finding the Fourth Proportional to 103,312.90, 154,969.35 and 69,851.80

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Solution

The fourth proportional to 103,312.90, 154,969.35 and 69,851.80 is: 104,777.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,312.90 : 154,969.35 = 69,851.80 : x
  2. Step 2: Convert to fraction form
    103,312.90/154,969.35 = 69,851.80/x
  3. Step 3: Cross multiply
    103,312.90x = 154,969.35 × 69,851.80
  4. Step 4: Simplify right side
    103,312.90x = 10,824,888,042.33
  5. Step 5: Solve for x
    x = 10,824,888,042.33/103,312.90
  6. Step 6: Final answer
    x = 104,777.70

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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.