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Finding the Fourth Proportional to 158,999.68, 219,423.36 and 87,386.50

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Solution

The fourth proportional to 158,999.68, 219,423.36 and 87,386.50 is: 120,595.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,999.68 : 219,423.36 = 87,386.50 : x
  2. Step 2: Convert to fraction form
    158,999.68/219,423.36 = 87,386.50/x
  3. Step 3: Cross multiply
    158,999.68x = 219,423.36 × 87,386.50
  4. Step 4: Simplify right side
    158,999.68x = 19,174,639,448.64
  5. Step 5: Solve for x
    x = 19,174,639,448.64/158,999.68
  6. Step 6: Final answer
    x = 120,595.46

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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.