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Finding the Fourth Proportional to 58,458.51, 87,678.05 and 21,011.00

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Solution

The fourth proportional to 58,458.51, 87,678.05 and 21,011.00 is: 31,513.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,458.51 : 87,678.05 = 21,011.00 : x
  2. Step 2: Convert to fraction form
    58,458.51/87,678.05 = 21,011.00/x
  3. Step 3: Cross multiply
    58,458.51x = 87,678.05 × 21,011.00
  4. Step 4: Simplify right side
    58,458.51x = 1,842,202,965.10
  5. Step 5: Solve for x
    x = 1,842,202,965.10/58,458.51
  6. Step 6: Final answer
    x = 31,513.00

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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.