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Finding the Fourth Proportional to 103,420.84, 142,720.68 and 58,708.84

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Solution

The fourth proportional to 103,420.84, 142,720.68 and 58,708.84 is: 81,018.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,420.84 : 142,720.68 = 58,708.84 : x
  2. Step 2: Convert to fraction form
    103,420.84/142,720.68 = 58,708.84/x
  3. Step 3: Cross multiply
    103,420.84x = 142,720.68 × 58,708.84
  4. Step 4: Simplify right side
    103,420.84x = 8,378,965,566.81
  5. Step 5: Solve for x
    x = 8,378,965,566.81/103,420.84
  6. Step 6: Final answer
    x = 81,018.15

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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.