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Finding the Fourth Proportional to 78,253.79, 107,988.27 and 43,798.01

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Solution

The fourth proportional to 78,253.79, 107,988.27 and 43,798.01 is: 60,440.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,253.79 : 107,988.27 = 43,798.01 : x
  2. Step 2: Convert to fraction form
    78,253.79/107,988.27 = 43,798.01/x
  3. Step 3: Cross multiply
    78,253.79x = 107,988.27 × 43,798.01
  4. Step 4: Simplify right side
    78,253.79x = 4,729,671,329.34
  5. Step 5: Solve for x
    x = 4,729,671,329.34/78,253.79
  6. Step 6: Final answer
    x = 60,440.16

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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.