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Finding the Fourth Proportional to 390,875.06, 586,345.47 and 124,673.42

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Solution

The fourth proportional to 390,875.06, 586,345.47 and 124,673.42 is: 187,020.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,875.06 : 586,345.47 = 124,673.42 : x
  2. Step 2: Convert to fraction form
    390,875.06/586,345.47 = 124,673.42/x
  3. Step 3: Cross multiply
    390,875.06x = 586,345.47 × 124,673.42
  4. Step 4: Simplify right side
    390,875.06x = 73,101,695,046.41
  5. Step 5: Solve for x
    x = 73,101,695,046.41/390,875.06
  6. Step 6: Final answer
    x = 187,020.62

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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.