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Finding the Fourth Proportional to 89,681.70, 134,459.64 and 39,734.70

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Solution

The fourth proportional to 89,681.70, 134,459.64 and 39,734.70 is: 59,574.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,681.70 : 134,459.64 = 39,734.70 : x
  2. Step 2: Convert to fraction form
    89,681.70/134,459.64 = 39,734.70/x
  3. Step 3: Cross multiply
    89,681.70x = 134,459.64 × 39,734.70
  4. Step 4: Simplify right side
    89,681.70x = 5,342,713,457.51
  5. Step 5: Solve for x
    x = 5,342,713,457.51/89,681.70
  6. Step 6: Final answer
    x = 59,574.18

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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.