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Finding the Fourth Proportional to 78,349.66, 108,119.57 and 42,538.91

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Solution

The fourth proportional to 78,349.66, 108,119.57 and 42,538.91 is: 58,702.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,349.66 : 108,119.57 = 42,538.91 : x
  2. Step 2: Convert to fraction form
    78,349.66/108,119.57 = 42,538.91/x
  3. Step 3: Cross multiply
    78,349.66x = 108,119.57 × 42,538.91
  4. Step 4: Simplify right side
    78,349.66x = 4,599,287,904.18
  5. Step 5: Solve for x
    x = 4,599,287,904.18/78,349.66
  6. Step 6: Final answer
    x = 58,702.08

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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.