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Finding the Fourth Proportional to 86,239,828.80, 129,422,728.80 and 60,730,660.80

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Solution

The fourth proportional to 86,239,828.80, 129,422,728.80 and 60,730,660.80 is: 91,140,346.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,239,828.80 : 129,422,728.80 = 60,730,660.80 : x
  2. Step 2: Convert to fraction form
    86,239,828.80/129,422,728.80 = 60,730,660.80/x
  3. Step 3: Cross multiply
    86,239,828.80x = 129,422,728.80 × 60,730,660.80
  4. Step 4: Simplify right side
    86,239,828.80x = 7,859,927,842,563,190
  5. Step 5: Solve for x
    x = 7,859,927,842,563,190/86,239,828.80
  6. Step 6: Final answer
    x = 91,140,346.08

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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.