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Finding the Fourth Proportional to 124,068.63, 171,141.75 and 78,055.08

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Solution

The fourth proportional to 124,068.63, 171,141.75 and 78,055.08 is: 107,670.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,068.63 : 171,141.75 = 78,055.08 : x
  2. Step 2: Convert to fraction form
    124,068.63/171,141.75 = 78,055.08/x
  3. Step 3: Cross multiply
    124,068.63x = 171,141.75 × 78,055.08
  4. Step 4: Simplify right side
    124,068.63x = 13,358,482,987.59
  5. Step 5: Solve for x
    x = 13,358,482,987.59/124,068.63
  6. Step 6: Final answer
    x = 107,670.11

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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.