Home / 129,402,431.12-178,598,421.24-76,476,978.20

Finding the Fourth Proportional to 129,402,431.12, 178,598,421.24 and 76,476,978.20

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Solution

The fourth proportional to 129,402,431.12, 178,598,421.24 and 76,476,978.20 is: 105,551,862.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,402,431.12 : 178,598,421.24 = 76,476,978.20 : x
  2. Step 2: Convert to fraction form
    129,402,431.12/178,598,421.24 = 76,476,978.20/x
  3. Step 3: Cross multiply
    129,402,431.12x = 178,598,421.24 × 76,476,978.20
  4. Step 4: Simplify right side
    129,402,431.12x = 13,658,667,567,725,898
  5. Step 5: Solve for x
    x = 13,658,667,567,725,898/129,402,431.12
  6. Step 6: Final answer
    x = 105,551,862.12

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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.