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Finding the Fourth Proportional to 115,430.27, 159,359.99 and 87,990.91

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Solution

The fourth proportional to 115,430.27, 159,359.99 and 87,990.91 is: 121,477.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,430.27 : 159,359.99 = 87,990.91 : x
  2. Step 2: Convert to fraction form
    115,430.27/159,359.99 = 87,990.91/x
  3. Step 3: Cross multiply
    115,430.27x = 159,359.99 × 87,990.91
  4. Step 4: Simplify right side
    115,430.27x = 14,022,229,699.34
  5. Step 5: Solve for x
    x = 14,022,229,699.34/115,430.27
  6. Step 6: Final answer
    x = 121,477.93

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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.