Home / 128,090.03-176,763.80-74,406.47

Finding the Fourth Proportional to 128,090.03, 176,763.80 and 74,406.47

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Solution

The fourth proportional to 128,090.03, 176,763.80 and 74,406.47 is: 102,680.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,090.03 : 176,763.80 = 74,406.47 : x
  2. Step 2: Convert to fraction form
    128,090.03/176,763.80 = 74,406.47/x
  3. Step 3: Cross multiply
    128,090.03x = 176,763.80 × 74,406.47
  4. Step 4: Simplify right side
    128,090.03x = 13,152,369,683.98
  5. Step 5: Solve for x
    x = 13,152,369,683.98/128,090.03
  6. Step 6: Final answer
    x = 102,680.67

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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.