Home / 129,417.76-178,566.96-72,808.48

Finding the Fourth Proportional to 129,417.76, 178,566.96 and 72,808.48

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Solution

The fourth proportional to 129,417.76, 178,566.96 and 72,808.48 is: 100,459.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,417.76 : 178,566.96 = 72,808.48 : x
  2. Step 2: Convert to fraction form
    129,417.76/178,566.96 = 72,808.48/x
  3. Step 3: Cross multiply
    129,417.76x = 178,566.96 × 72,808.48
  4. Step 4: Simplify right side
    129,417.76x = 13,001,188,935.82
  5. Step 5: Solve for x
    x = 13,001,188,935.82/129,417.76
  6. Step 6: Final answer
    x = 100,459.08

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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.