Home / 207,172,421.60-310,795,957.20-86,016,120.80

Finding the Fourth Proportional to 207,172,421.60, 310,795,957.20 and 86,016,120.80

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Solution

The fourth proportional to 207,172,421.60, 310,795,957.20 and 86,016,120.80 is: 129,039,678.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,172,421.60 : 310,795,957.20 = 86,016,120.80 : x
  2. Step 2: Convert to fraction form
    207,172,421.60/310,795,957.20 = 86,016,120.80/x
  3. Step 3: Cross multiply
    207,172,421.60x = 310,795,957.20 × 86,016,120.80
  4. Step 4: Simplify right side
    207,172,421.60x = 26,733,462,598,666,828
  5. Step 5: Solve for x
    x = 26,733,462,598,666,828/207,172,421.60
  6. Step 6: Final answer
    x = 129,039,678.12

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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.