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Finding the Fourth Proportional to 249,855.94, 374,810.16 and 81,389.40

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Solution

The fourth proportional to 249,855.94, 374,810.16 and 81,389.40 is: 122,092.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,855.94 : 374,810.16 = 81,389.40 : x
  2. Step 2: Convert to fraction form
    249,855.94/374,810.16 = 81,389.40/x
  3. Step 3: Cross multiply
    249,855.94x = 374,810.16 × 81,389.40
  4. Step 4: Simplify right side
    249,855.94x = 30,505,574,036.30
  5. Step 5: Solve for x
    x = 30,505,574,036.30/249,855.94
  6. Step 6: Final answer
    x = 122,092.65

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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.