Home / 78,970.77-118,456.34-39,488.13

Finding the Fourth Proportional to 78,970.77, 118,456.34 and 39,488.13

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Solution

The fourth proportional to 78,970.77, 118,456.34 and 39,488.13 is: 59,232.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,970.77 : 118,456.34 = 39,488.13 : x
  2. Step 2: Convert to fraction form
    78,970.77/118,456.34 = 39,488.13/x
  3. Step 3: Cross multiply
    78,970.77x = 118,456.34 × 39,488.13
  4. Step 4: Simplify right side
    78,970.77x = 4,677,619,155.80
  5. Step 5: Solve for x
    x = 4,677,619,155.80/78,970.77
  6. Step 6: Final answer
    x = 59,232.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.