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Finding the Fourth Proportional to 64,206.70, 88,661.55 and 40,374.70

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Solution

The fourth proportional to 64,206.70, 88,661.55 and 40,374.70 is: 55,752.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,206.70 : 88,661.55 = 40,374.70 : x
  2. Step 2: Convert to fraction form
    64,206.70/88,661.55 = 40,374.70/x
  3. Step 3: Cross multiply
    64,206.70x = 88,661.55 × 40,374.70
  4. Step 4: Simplify right side
    64,206.70x = 3,579,683,482.79
  5. Step 5: Solve for x
    x = 3,579,683,482.79/64,206.70
  6. Step 6: Final answer
    x = 55,752.49

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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.