Home / 128,004.06-176,644.36-70,643.91

Finding the Fourth Proportional to 128,004.06, 176,644.36 and 70,643.91

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Solution

The fourth proportional to 128,004.06, 176,644.36 and 70,643.91 is: 97,487.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,004.06 : 176,644.36 = 70,643.91 : x
  2. Step 2: Convert to fraction form
    128,004.06/176,644.36 = 70,643.91/x
  3. Step 3: Cross multiply
    128,004.06x = 176,644.36 × 70,643.91
  4. Step 4: Simplify right side
    128,004.06x = 12,478,848,269.85
  5. Step 5: Solve for x
    x = 12,478,848,269.85/128,004.06
  6. Step 6: Final answer
    x = 97,487.91

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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.