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Finding the Fourth Proportional to 117,422,428.80, 176,133,643.20 and 86,811,427.20

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Solution

The fourth proportional to 117,422,428.80, 176,133,643.20 and 86,811,427.20 is: 130,217,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,422,428.80 : 176,133,643.20 = 86,811,427.20 : x
  2. Step 2: Convert to fraction form
    117,422,428.80/176,133,643.20 = 86,811,427.20/x
  3. Step 3: Cross multiply
    117,422,428.80x = 176,133,643.20 × 86,811,427.20
  4. Step 4: Simplify right side
    117,422,428.80x = 15,290,412,944,127,574
  5. Step 5: Solve for x
    x = 15,290,412,944,127,574/117,422,428.80
  6. Step 6: Final answer
    x = 130,217,140.80

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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.