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Finding the Fourth Proportional to 122,369.40, 168,869.90 and 71,417.16

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Solution

The fourth proportional to 122,369.40, 168,869.90 and 71,417.16 is: 98,555.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,369.40 : 168,869.90 = 71,417.16 : x
  2. Step 2: Convert to fraction form
    122,369.40/168,869.90 = 71,417.16/x
  3. Step 3: Cross multiply
    122,369.40x = 168,869.90 × 71,417.16
  4. Step 4: Simplify right side
    122,369.40x = 12,060,208,667.48
  5. Step 5: Solve for x
    x = 12,060,208,667.48/122,369.40
  6. Step 6: Final answer
    x = 98,555.76

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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.