Home / 78,038.19-107,691.87-42,227.40

Finding the Fourth Proportional to 78,038.19, 107,691.87 and 42,227.40

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Solution

The fourth proportional to 78,038.19, 107,691.87 and 42,227.40 is: 58,273.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,038.19 : 107,691.87 = 42,227.40 : x
  2. Step 2: Convert to fraction form
    78,038.19/107,691.87 = 42,227.40/x
  3. Step 3: Cross multiply
    78,038.19x = 107,691.87 × 42,227.40
  4. Step 4: Simplify right side
    78,038.19x = 4,547,547,671.24
  5. Step 5: Solve for x
    x = 4,547,547,671.24/78,038.19
  6. Step 6: Final answer
    x = 58,273.36

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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.