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Finding the Fourth Proportional to 89,802.51, 134,703.77 and 39,870.87

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Solution

The fourth proportional to 89,802.51, 134,703.77 and 39,870.87 is: 59,806.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,802.51 : 134,703.77 = 39,870.87 : x
  2. Step 2: Convert to fraction form
    89,802.51/134,703.77 = 39,870.87/x
  3. Step 3: Cross multiply
    89,802.51x = 134,703.77 × 39,870.87
  4. Step 4: Simplify right side
    89,802.51x = 5,370,756,302.83
  5. Step 5: Solve for x
    x = 5,370,756,302.83/89,802.51
  6. Step 6: Final answer
    x = 59,806.31

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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.