Home / 128,144.28-176,835.50-70,782.47

Finding the Fourth Proportional to 128,144.28, 176,835.50 and 70,782.47

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Solution

The fourth proportional to 128,144.28, 176,835.50 and 70,782.47 is: 97,677.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,144.28 : 176,835.50 = 70,782.47 : x
  2. Step 2: Convert to fraction form
    128,144.28/176,835.50 = 70,782.47/x
  3. Step 3: Cross multiply
    128,144.28x = 176,835.50 × 70,782.47
  4. Step 4: Simplify right side
    128,144.28x = 12,516,852,235.60
  5. Step 5: Solve for x
    x = 12,516,852,235.60/128,144.28
  6. Step 6: Final answer
    x = 97,677.81

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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.