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Finding the Fourth Proportional to 103,956.71, 155,182.98 and 91,345.34

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Solution

The fourth proportional to 103,956.71, 155,182.98 and 91,345.34 is: 136,357.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,956.71 : 155,182.98 = 91,345.34 : x
  2. Step 2: Convert to fraction form
    103,956.71/155,182.98 = 91,345.34/x
  3. Step 3: Cross multiply
    103,956.71x = 155,182.98 × 91,345.34
  4. Step 4: Simplify right side
    103,956.71x = 14,175,241,294.40
  5. Step 5: Solve for x
    x = 14,175,241,294.40/103,956.71
  6. Step 6: Final answer
    x = 136,357.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.