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Finding the Fourth Proportional to 153,290.60, 211,547.94 and 86,222.60

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Solution

The fourth proportional to 153,290.60, 211,547.94 and 86,222.60 is: 118,991.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,290.60 : 211,547.94 = 86,222.60 : x
  2. Step 2: Convert to fraction form
    153,290.60/211,547.94 = 86,222.60/x
  3. Step 3: Cross multiply
    153,290.60x = 211,547.94 × 86,222.60
  4. Step 4: Simplify right side
    153,290.60x = 18,240,213,411.44
  5. Step 5: Solve for x
    x = 18,240,213,411.44/153,290.60
  6. Step 6: Final answer
    x = 118,991.08

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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.