Home / 142,102.50-196,100.10-77,571.15

Finding the Fourth Proportional to 142,102.50, 196,100.10 and 77,571.15

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Solution

The fourth proportional to 142,102.50, 196,100.10 and 77,571.15 is: 107,047.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,102.50 : 196,100.10 = 77,571.15 : x
  2. Step 2: Convert to fraction form
    142,102.50/196,100.10 = 77,571.15/x
  3. Step 3: Cross multiply
    142,102.50x = 196,100.10 × 77,571.15
  4. Step 4: Simplify right side
    142,102.50x = 15,211,710,272.12
  5. Step 5: Solve for x
    x = 15,211,710,272.12/142,102.50
  6. Step 6: Final answer
    x = 107,047.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.