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Finding the Fourth Proportional to 78,549.51, 108,400.65 and 42,741.84

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Solution

The fourth proportional to 78,549.51, 108,400.65 and 42,741.84 is: 58,985.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,549.51 : 108,400.65 = 42,741.84 : x
  2. Step 2: Convert to fraction form
    78,549.51/108,400.65 = 42,741.84/x
  3. Step 3: Cross multiply
    78,549.51x = 108,400.65 × 42,741.84
  4. Step 4: Simplify right side
    78,549.51x = 4,633,243,238.20
  5. Step 5: Solve for x
    x = 4,633,243,238.20/78,549.51
  6. Step 6: Final answer
    x = 58,985.00

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1.5x scale

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.