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Finding the Fourth Proportional to 105,599.16, 145,686.06 and 67,894.20

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Solution

The fourth proportional to 105,599.16, 145,686.06 and 67,894.20 is: 93,667.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,599.16 : 145,686.06 = 67,894.20 : x
  2. Step 2: Convert to fraction form
    105,599.16/145,686.06 = 67,894.20/x
  3. Step 3: Cross multiply
    105,599.16x = 145,686.06 × 67,894.20
  4. Step 4: Simplify right side
    105,599.16x = 9,891,238,494.85
  5. Step 5: Solve for x
    x = 9,891,238,494.85/105,599.16
  6. Step 6: Final answer
    x = 93,667.78

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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.