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Finding the Fourth Proportional to 55,854.84, 77,085.90 and 30,703.80

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Solution

The fourth proportional to 55,854.84, 77,085.90 and 30,703.80 is: 42,374.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,854.84 : 77,085.90 = 30,703.80 : x
  2. Step 2: Convert to fraction form
    55,854.84/77,085.90 = 30,703.80/x
  3. Step 3: Cross multiply
    55,854.84x = 77,085.90 × 30,703.80
  4. Step 4: Simplify right side
    55,854.84x = 2,366,830,056.42
  5. Step 5: Solve for x
    x = 2,366,830,056.42/55,854.84
  6. Step 6: Final answer
    x = 42,374.66

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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.