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Finding the Fourth Proportional to 86,488.86, 119,409.12 and 66,308.34

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Solution

The fourth proportional to 86,488.86, 119,409.12 and 66,308.34 is: 91,547.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,488.86 : 119,409.12 = 66,308.34 : x
  2. Step 2: Convert to fraction form
    86,488.86/119,409.12 = 66,308.34/x
  3. Step 3: Cross multiply
    86,488.86x = 119,409.12 × 66,308.34
  4. Step 4: Simplify right side
    86,488.86x = 7,917,820,528.06
  5. Step 5: Solve for x
    x = 7,917,820,528.06/86,488.86
  6. Step 6: Final answer
    x = 91,547.29

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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.