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Finding the Fourth Proportional to 104,875.69, 144,730.68 and 57,128.93

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Solution

The fourth proportional to 104,875.69, 144,730.68 and 57,128.93 is: 78,839.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,875.69 : 144,730.68 = 57,128.93 : x
  2. Step 2: Convert to fraction form
    104,875.69/144,730.68 = 57,128.93/x
  3. Step 3: Cross multiply
    104,875.69x = 144,730.68 × 57,128.93
  4. Step 4: Simplify right side
    104,875.69x = 8,268,308,886.57
  5. Step 5: Solve for x
    x = 8,268,308,886.57/104,875.69
  6. Step 6: Final answer
    x = 78,839.14

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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.