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Finding the Fourth Proportional to 86,387.64, 129,482.64 and 36,392.82

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Solution

The fourth proportional to 86,387.64, 129,482.64 and 36,392.82 is: 54,547.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,387.64 : 129,482.64 = 36,392.82 : x
  2. Step 2: Convert to fraction form
    86,387.64/129,482.64 = 36,392.82/x
  3. Step 3: Cross multiply
    86,387.64x = 129,482.64 × 36,392.82
  4. Step 4: Simplify right side
    86,387.64x = 4,712,238,410.64
  5. Step 5: Solve for x
    x = 4,712,238,410.64/86,387.64
  6. Step 6: Final answer
    x = 54,547.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.