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Finding the Fourth Proportional to 134,543.72, 185,670.48 and 77,987.96

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Solution

The fourth proportional to 134,543.72, 185,670.48 and 77,987.96 is: 107,623.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,543.72 : 185,670.48 = 77,987.96 : x
  2. Step 2: Convert to fraction form
    134,543.72/185,670.48 = 77,987.96/x
  3. Step 3: Cross multiply
    134,543.72x = 185,670.48 × 77,987.96
  4. Step 4: Simplify right side
    134,543.72x = 14,480,061,967.42
  5. Step 5: Solve for x
    x = 14,480,061,967.42/134,543.72
  6. Step 6: Final answer
    x = 107,623.47

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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.