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Finding the Fourth Proportional to 72,926.16, 100,637.51 and 40,660.40

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Solution

The fourth proportional to 72,926.16, 100,637.51 and 40,660.40 is: 56,111.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,926.16 : 100,637.51 = 40,660.40 : x
  2. Step 2: Convert to fraction form
    72,926.16/100,637.51 = 40,660.40/x
  3. Step 3: Cross multiply
    72,926.16x = 100,637.51 × 40,660.40
  4. Step 4: Simplify right side
    72,926.16x = 4,091,960,705.11
  5. Step 5: Solve for x
    x = 4,091,960,705.11/72,926.16
  6. Step 6: Final answer
    x = 56,111.01

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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.