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Finding the Fourth Proportional to 245,881.26, 339,312.90 and 138,461.90

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Solution

The fourth proportional to 245,881.26, 339,312.90 and 138,461.90 is: 191,075.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,881.26 : 339,312.90 = 138,461.90 : x
  2. Step 2: Convert to fraction form
    245,881.26/339,312.90 = 138,461.90/x
  3. Step 3: Cross multiply
    245,881.26x = 339,312.90 × 138,461.90
  4. Step 4: Simplify right side
    245,881.26x = 46,981,908,828.51
  5. Step 5: Solve for x
    x = 46,981,908,828.51/245,881.26
  6. Step 6: Final answer
    x = 191,075.60

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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.