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Finding the Fourth Proportional to 78,347.84, 108,119.40 and 42,537.12

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Solution

The fourth proportional to 78,347.84, 108,119.40 and 42,537.12 is: 58,700.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,347.84 : 108,119.40 = 42,537.12 : x
  2. Step 2: Convert to fraction form
    78,347.84/108,119.40 = 42,537.12/x
  3. Step 3: Cross multiply
    78,347.84x = 108,119.40 × 42,537.12
  4. Step 4: Simplify right side
    78,347.84x = 4,599,087,892.13
  5. Step 5: Solve for x
    x = 4,599,087,892.13/78,347.84
  6. Step 6: Final answer
    x = 58,700.89

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1.5x scale

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.