Home / 142,070.76-196,056.32-78,407.19

Finding the Fourth Proportional to 142,070.76, 196,056.32 and 78,407.19

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Solution

The fourth proportional to 142,070.76, 196,056.32 and 78,407.19 is: 108,201.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,070.76 : 196,056.32 = 78,407.19 : x
  2. Step 2: Convert to fraction form
    142,070.76/196,056.32 = 78,407.19/x
  3. Step 3: Cross multiply
    142,070.76x = 196,056.32 × 78,407.19
  4. Step 4: Simplify right side
    142,070.76x = 15,372,224,740.90
  5. Step 5: Solve for x
    x = 15,372,224,740.90/142,070.76
  6. Step 6: Final answer
    x = 108,201.19

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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.