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Finding the Fourth Proportional to 56,018.75, 77,307.50 and 30,869.87

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Solution

The fourth proportional to 56,018.75, 77,307.50 and 30,869.87 is: 42,601.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,018.75 : 77,307.50 = 30,869.87 : x
  2. Step 2: Convert to fraction form
    56,018.75/77,307.50 = 30,869.87/x
  3. Step 3: Cross multiply
    56,018.75x = 77,307.50 × 30,869.87
  4. Step 4: Simplify right side
    56,018.75x = 2,386,472,320.68
  5. Step 5: Solve for x
    x = 2,386,472,320.68/56,018.75
  6. Step 6: Final answer
    x = 42,601.31

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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.