Home / 78,319.51-108,081.02-42,509.53

Finding the Fourth Proportional to 78,319.51, 108,081.02 and 42,509.53

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Solution

The fourth proportional to 78,319.51, 108,081.02 and 42,509.53 is: 58,663.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,319.51 : 108,081.02 = 42,509.53 : x
  2. Step 2: Convert to fraction form
    78,319.51/108,081.02 = 42,509.53/x
  3. Step 3: Cross multiply
    78,319.51x = 108,081.02 × 42,509.53
  4. Step 4: Simplify right side
    78,319.51x = 4,594,473,362.12
  5. Step 5: Solve for x
    x = 4,594,473,362.12/78,319.51
  6. Step 6: Final answer
    x = 58,663.20

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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.