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Finding the Fourth Proportional to 78,681.74, 118,125.48 and 46,719.14

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Solution

The fourth proportional to 78,681.74, 118,125.48 and 46,719.14 is: 70,139.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,681.74 : 118,125.48 = 46,719.14 : x
  2. Step 2: Convert to fraction form
    78,681.74/118,125.48 = 46,719.14/x
  3. Step 3: Cross multiply
    78,681.74x = 118,125.48 × 46,719.14
  4. Step 4: Simplify right side
    78,681.74x = 5,518,720,247.06
  5. Step 5: Solve for x
    x = 5,518,720,247.06/78,681.74
  6. Step 6: Final answer
    x = 70,139.79

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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.