Home / 56,915.35-78,539.76-31,421.08

Finding the Fourth Proportional to 56,915.35, 78,539.76 and 31,421.08

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Solution

The fourth proportional to 56,915.35, 78,539.76 and 31,421.08 is: 43,359.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,915.35 : 78,539.76 = 31,421.08 : x
  2. Step 2: Convert to fraction form
    56,915.35/78,539.76 = 31,421.08/x
  3. Step 3: Cross multiply
    56,915.35x = 78,539.76 × 31,421.08
  4. Step 4: Simplify right side
    56,915.35x = 2,467,803,981.53
  5. Step 5: Solve for x
    x = 2,467,803,981.53/56,915.35
  6. Step 6: Final answer
    x = 43,359.20

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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.