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Finding the Fourth Proportional to 235,670.60, 325,220.13 and 128,240.91

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Solution

The fourth proportional to 235,670.60, 325,220.13 and 128,240.91 is: 176,969.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,670.60 : 325,220.13 = 128,240.91 : x
  2. Step 2: Convert to fraction form
    235,670.60/325,220.13 = 128,240.91/x
  3. Step 3: Cross multiply
    235,670.60x = 325,220.13 × 128,240.91
  4. Step 4: Simplify right side
    235,670.60x = 41,706,525,421.52
  5. Step 5: Solve for x
    x = 41,706,525,421.52/235,670.60
  6. Step 6: Final answer
    x = 176,969.57

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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.