Home / 98,780.16-136,315.22-56,339.40

Finding the Fourth Proportional to 98,780.16, 136,315.22 and 56,339.40

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Solution

The fourth proportional to 98,780.16, 136,315.22 and 56,339.40 is: 77,747.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,780.16 : 136,315.22 = 56,339.40 : x
  2. Step 2: Convert to fraction form
    98,780.16/136,315.22 = 56,339.40/x
  3. Step 3: Cross multiply
    98,780.16x = 136,315.22 × 56,339.40
  4. Step 4: Simplify right side
    98,780.16x = 7,679,917,705.67
  5. Step 5: Solve for x
    x = 7,679,917,705.67/98,780.16
  6. Step 6: Final answer
    x = 77,747.57

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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.