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Finding the Fourth Proportional to 56,612.68, 78,128.10 and 31,460.68

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Solution

The fourth proportional to 56,612.68, 78,128.10 and 31,460.68 is: 43,417.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,612.68 : 78,128.10 = 31,460.68 : x
  2. Step 2: Convert to fraction form
    56,612.68/78,128.10 = 31,460.68/x
  3. Step 3: Cross multiply
    56,612.68x = 78,128.10 × 31,460.68
  4. Step 4: Simplify right side
    56,612.68x = 2,457,963,153.11
  5. Step 5: Solve for x
    x = 2,457,963,153.11/56,612.68
  6. Step 6: Final answer
    x = 43,417.18

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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.