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Finding the Fourth Proportional to 235,735.76, 325,322.24 and 128,312.72

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Solution

The fourth proportional to 235,735.76, 325,322.24 and 128,312.72 is: 177,075.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,735.76 : 325,322.24 = 128,312.72 : x
  2. Step 2: Convert to fraction form
    235,735.76/325,322.24 = 128,312.72/x
  3. Step 3: Cross multiply
    235,735.76x = 325,322.24 × 128,312.72
  4. Step 4: Simplify right side
    235,735.76x = 41,742,981,490.89
  5. Step 5: Solve for x
    x = 41,742,981,490.89/235,735.76
  6. Step 6: Final answer
    x = 177,075.30

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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.