Home / 78,780.56-108,717.14-42,970.55

Finding the Fourth Proportional to 78,780.56, 108,717.14 and 42,970.55

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Solution

The fourth proportional to 78,780.56, 108,717.14 and 42,970.55 is: 59,299.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,780.56 : 108,717.14 = 42,970.55 : x
  2. Step 2: Convert to fraction form
    78,780.56/108,717.14 = 42,970.55/x
  3. Step 3: Cross multiply
    78,780.56x = 108,717.14 × 42,970.55
  4. Step 4: Simplify right side
    78,780.56x = 4,671,634,864.07
  5. Step 5: Solve for x
    x = 4,671,634,864.07/78,780.56
  6. Step 6: Final answer
    x = 59,299.34

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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.