Home / 103,689.90-155,534.85-70,512.30

Finding the Fourth Proportional to 103,689.90, 155,534.85 and 70,512.30

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Solution

The fourth proportional to 103,689.90, 155,534.85 and 70,512.30 is: 105,768.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.90 : 155,534.85 = 70,512.30 : x
  2. Step 2: Convert to fraction form
    103,689.90/155,534.85 = 70,512.30/x
  3. Step 3: Cross multiply
    103,689.90x = 155,534.85 × 70,512.30
  4. Step 4: Simplify right side
    103,689.90x = 10,967,120,003.66
  5. Step 5: Solve for x
    x = 10,967,120,003.66/103,689.90
  6. Step 6: Final answer
    x = 105,768.45

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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.