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Finding the Fourth Proportional to 86,574, 119,473.99 and 47,811.70

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Solution

The fourth proportional to 86,574, 119,473.99 and 47,811.70 is: 65,981.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,574 : 119,473.99 = 47,811.70 : x
  2. Step 2: Convert to fraction form
    86,574/119,473.99 = 47,811.70/x
  3. Step 3: Cross multiply
    86,574x = 119,473.99 × 47,811.70
  4. Step 4: Simplify right side
    86,574x = 5,712,254,448.15
  5. Step 5: Solve for x
    x = 5,712,254,448.15/86,574
  6. Step 6: Final answer
    x = 65,981.18

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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.