Home / 90,907.82-125,417.40-56,902.40

Finding the Fourth Proportional to 90,907.82, 125,417.40 and 56,902.40

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Solution

The fourth proportional to 90,907.82, 125,417.40 and 56,902.40 is: 78,503.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,907.82 : 125,417.40 = 56,902.40 : x
  2. Step 2: Convert to fraction form
    90,907.82/125,417.40 = 56,902.40/x
  3. Step 3: Cross multiply
    90,907.82x = 125,417.40 × 56,902.40
  4. Step 4: Simplify right side
    90,907.82x = 7,136,551,061.76
  5. Step 5: Solve for x
    x = 7,136,551,061.76/90,907.82
  6. Step 6: Final answer
    x = 78,503.16

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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.