Home / 76,389.42-105,417.45-42,397.92

Finding the Fourth Proportional to 76,389.42, 105,417.45 and 42,397.92

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Solution

The fourth proportional to 76,389.42, 105,417.45 and 42,397.92 is: 58,509.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,389.42 : 105,417.45 = 42,397.92 : x
  2. Step 2: Convert to fraction form
    76,389.42/105,417.45 = 42,397.92/x
  3. Step 3: Cross multiply
    76,389.42x = 105,417.45 × 42,397.92
  4. Step 4: Simplify right side
    76,389.42x = 4,469,480,611.70
  5. Step 5: Solve for x
    x = 4,469,480,611.70/76,389.42
  6. Step 6: Final answer
    x = 58,509.16

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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.