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Finding the Fourth Proportional to 245,578.26, 368,428.71 and 85,656.51

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Solution

The fourth proportional to 245,578.26, 368,428.71 and 85,656.51 is: 128,506.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,578.26 : 368,428.71 = 85,656.51 : x
  2. Step 2: Convert to fraction form
    245,578.26/368,428.71 = 85,656.51/x
  3. Step 3: Cross multiply
    245,578.26x = 368,428.71 × 85,656.51
  4. Step 4: Simplify right side
    245,578.26x = 31,558,317,482.40
  5. Step 5: Solve for x
    x = 31,558,317,482.40/245,578.26
  6. Step 6: Final answer
    x = 128,506.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.