Home / 98,781.92-136,285.20-56,309.76

Finding the Fourth Proportional to 98,781.92, 136,285.20 and 56,309.76

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Solution

The fourth proportional to 98,781.92, 136,285.20 and 56,309.76 is: 77,688.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,781.92 : 136,285.20 = 56,309.76 : x
  2. Step 2: Convert to fraction form
    98,781.92/136,285.20 = 56,309.76/x
  3. Step 3: Cross multiply
    98,781.92x = 136,285.20 × 56,309.76
  4. Step 4: Simplify right side
    98,781.92x = 7,674,186,903.55
  5. Step 5: Solve for x
    x = 7,674,186,903.55/98,781.92
  6. Step 6: Final answer
    x = 77,688.17

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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.