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Finding the Fourth Proportional to 58,486.04, 87,719.28 and 21,038.48

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Solution

The fourth proportional to 58,486.04, 87,719.28 and 21,038.48 is: 31,554.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,486.04 : 87,719.28 = 21,038.48 : x
  2. Step 2: Convert to fraction form
    58,486.04/87,719.28 = 21,038.48/x
  3. Step 3: Cross multiply
    58,486.04x = 87,719.28 × 21,038.48
  4. Step 4: Simplify right side
    58,486.04x = 1,845,480,317.89
  5. Step 5: Solve for x
    x = 1,845,480,317.89/58,486.04
  6. Step 6: Final answer
    x = 31,554.20

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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.