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Finding the Fourth Proportional to 58,345.65, 87,521.43 and 28,387.40

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Solution

The fourth proportional to 58,345.65, 87,521.43 and 28,387.40 is: 42,582.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,345.65 : 87,521.43 = 28,387.40 : x
  2. Step 2: Convert to fraction form
    58,345.65/87,521.43 = 28,387.40/x
  3. Step 3: Cross multiply
    58,345.65x = 87,521.43 × 28,387.40
  4. Step 4: Simplify right side
    58,345.65x = 2,484,505,404.37
  5. Step 5: Solve for x
    x = 2,484,505,404.37/58,345.65
  6. Step 6: Final answer
    x = 42,582.53

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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.