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Finding the Fourth Proportional to 78,603.53, 118,434.92 and 64,871.14

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Solution

The fourth proportional to 78,603.53, 118,434.92 and 64,871.14 is: 97,743.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,603.53 : 118,434.92 = 64,871.14 : x
  2. Step 2: Convert to fraction form
    78,603.53/118,434.92 = 64,871.14/x
  3. Step 3: Cross multiply
    78,603.53x = 118,434.92 × 64,871.14
  4. Step 4: Simplify right side
    78,603.53x = 7,683,008,089.99
  5. Step 5: Solve for x
    x = 7,683,008,089.99/78,603.53
  6. Step 6: Final answer
    x = 97,743.81

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.