Home / 138,347.66-190,937.18-77,929.76

Finding the Fourth Proportional to 138,347.66, 190,937.18 and 77,929.76

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Solution

The fourth proportional to 138,347.66, 190,937.18 and 77,929.76 is: 107,552.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,347.66 : 190,937.18 = 77,929.76 : x
  2. Step 2: Convert to fraction form
    138,347.66/190,937.18 = 77,929.76/x
  3. Step 3: Cross multiply
    138,347.66x = 190,937.18 × 77,929.76
  4. Step 4: Simplify right side
    138,347.66x = 14,879,688,612.48
  5. Step 5: Solve for x
    x = 14,879,688,612.48/138,347.66
  6. Step 6: Final answer
    x = 107,552.88

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1.5x scale

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.