Home / 142,779.06-197,032.74-78,247.80

Finding the Fourth Proportional to 142,779.06, 197,032.74 and 78,247.80

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Solution

The fourth proportional to 142,779.06, 197,032.74 and 78,247.80 is: 107,980.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,779.06 : 197,032.74 = 78,247.80 : x
  2. Step 2: Convert to fraction form
    142,779.06/197,032.74 = 78,247.80/x
  3. Step 3: Cross multiply
    142,779.06x = 197,032.74 × 78,247.80
  4. Step 4: Simplify right side
    142,779.06x = 15,417,378,432.97
  5. Step 5: Solve for x
    x = 15,417,378,432.97/142,779.06
  6. Step 6: Final answer
    x = 107,980.67

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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.