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Finding the Fourth Proportional to 86,390.96, 119,259.54 and 60,918.08

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Solution

The fourth proportional to 86,390.96, 119,259.54 and 60,918.08 is: 84,095.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,390.96 : 119,259.54 = 60,918.08 : x
  2. Step 2: Convert to fraction form
    86,390.96/119,259.54 = 60,918.08/x
  3. Step 3: Cross multiply
    86,390.96x = 119,259.54 × 60,918.08
  4. Step 4: Simplify right side
    86,390.96x = 7,265,061,602.19
  5. Step 5: Solve for x
    x = 7,265,061,602.19/86,390.96
  6. Step 6: Final answer
    x = 84,095.16

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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.