Home / 77,478.07-116,204.35-72,434.61

Finding the Fourth Proportional to 77,478.07, 116,204.35 and 72,434.61

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Solution

The fourth proportional to 77,478.07, 116,204.35 and 72,434.61 is: 108,639.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,478.07 : 116,204.35 = 72,434.61 : x
  2. Step 2: Convert to fraction form
    77,478.07/116,204.35 = 72,434.61/x
  3. Step 3: Cross multiply
    77,478.07x = 116,204.35 × 72,434.61
  4. Step 4: Simplify right side
    77,478.07x = 8,417,215,829.36
  5. Step 5: Solve for x
    x = 8,417,215,829.36/77,478.07
  6. Step 6: Final answer
    x = 108,639.98

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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.