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Finding the Fourth Proportional to 138,656.61, 191,345.97 and 74,994.25

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Solution

The fourth proportional to 138,656.61, 191,345.97 and 74,994.25 is: 103,491.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,656.61 : 191,345.97 = 74,994.25 : x
  2. Step 2: Convert to fraction form
    138,656.61/191,345.97 = 74,994.25/x
  3. Step 3: Cross multiply
    138,656.61x = 191,345.97 × 74,994.25
  4. Step 4: Simplify right side
    138,656.61x = 14,349,847,510.67
  5. Step 5: Solve for x
    x = 14,349,847,510.67/138,656.61
  6. Step 6: Final answer
    x = 103,491.98

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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.