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Finding the Fourth Proportional to 70,291.76, 105,314.81 and 58,521.17

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Solution

The fourth proportional to 70,291.76, 105,314.81 and 58,521.17 is: 87,679.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,291.76 : 105,314.81 = 58,521.17 : x
  2. Step 2: Convert to fraction form
    70,291.76/105,314.81 = 58,521.17/x
  3. Step 3: Cross multiply
    70,291.76x = 105,314.81 × 58,521.17
  4. Step 4: Simplify right side
    70,291.76x = 6,163,146,423.64
  5. Step 5: Solve for x
    x = 6,163,146,423.64/70,291.76
  6. Step 6: Final answer
    x = 87,679.50

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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.