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Finding the Fourth Proportional to 210,660.98, 290,705.88 and 115,165.76

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Solution

The fourth proportional to 210,660.98, 290,705.88 and 115,165.76 is: 158,925.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,660.98 : 290,705.88 = 115,165.76 : x
  2. Step 2: Convert to fraction form
    210,660.98/290,705.88 = 115,165.76/x
  3. Step 3: Cross multiply
    210,660.98x = 290,705.88 × 115,165.76
  4. Step 4: Simplify right side
    210,660.98x = 33,479,363,606.67
  5. Step 5: Solve for x
    x = 33,479,363,606.67/210,660.98
  6. Step 6: Final answer
    x = 158,925.32

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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.