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Finding the Fourth Proportional to 78,840.66, 108,799.26 and 43,030.38

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Solution

The fourth proportional to 78,840.66, 108,799.26 and 43,030.38 is: 59,381.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,840.66 : 108,799.26 = 43,030.38 : x
  2. Step 2: Convert to fraction form
    78,840.66/108,799.26 = 43,030.38/x
  3. Step 3: Cross multiply
    78,840.66x = 108,799.26 × 43,030.38
  4. Step 4: Simplify right side
    78,840.66x = 4,681,673,501.52
  5. Step 5: Solve for x
    x = 4,681,673,501.52/78,840.66
  6. Step 6: Final answer
    x = 59,381.46

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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.