Home / 138,589.02-191,282.51-87,569.35

Finding the Fourth Proportional to 138,589.02, 191,282.51 and 87,569.35

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Solution

The fourth proportional to 138,589.02, 191,282.51 and 87,569.35 is: 120,864.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,589.02 : 191,282.51 = 87,569.35 : x
  2. Step 2: Convert to fraction form
    138,589.02/191,282.51 = 87,569.35/x
  3. Step 3: Cross multiply
    138,589.02x = 191,282.51 × 87,569.35
  4. Step 4: Simplify right side
    138,589.02x = 16,750,484,807.79
  5. Step 5: Solve for x
    x = 16,750,484,807.79/138,589.02
  6. Step 6: Final answer
    x = 120,864.44

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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.