Home / 78,237.12-107,966.28-42,426.70

Finding the Fourth Proportional to 78,237.12, 107,966.28 and 42,426.70

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Solution

The fourth proportional to 78,237.12, 107,966.28 and 42,426.70 is: 58,548.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,237.12 : 107,966.28 = 42,426.70 : x
  2. Step 2: Convert to fraction form
    78,237.12/107,966.28 = 42,426.70/x
  3. Step 3: Cross multiply
    78,237.12x = 107,966.28 × 42,426.70
  4. Step 4: Simplify right side
    78,237.12x = 4,580,653,468.17
  5. Step 5: Solve for x
    x = 4,580,653,468.17/78,237.12
  6. Step 6: Final answer
    x = 58,548.34

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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.