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Finding the Fourth Proportional to 89,864.96, 134,796.80 and 70,160

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Solution

The fourth proportional to 89,864.96, 134,796.80 and 70,160 is: 105,239.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,864.96 : 134,796.80 = 70,160 : x
  2. Step 2: Convert to fraction form
    89,864.96/134,796.80 = 70,160/x
  3. Step 3: Cross multiply
    89,864.96x = 134,796.80 × 70,160
  4. Step 4: Simplify right side
    89,864.96x = 9,457,343,488
  5. Step 5: Solve for x
    x = 9,457,343,488/89,864.96
  6. Step 6: Final answer
    x = 105,239.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.