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Finding the Fourth Proportional to 64,478.42, 88,957.40 and 42,135.38

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Solution

The fourth proportional to 64,478.42, 88,957.40 and 42,135.38 is: 58,131.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,478.42 : 88,957.40 = 42,135.38 : x
  2. Step 2: Convert to fraction form
    64,478.42/88,957.40 = 42,135.38/x
  3. Step 3: Cross multiply
    64,478.42x = 88,957.40 × 42,135.38
  4. Step 4: Simplify right side
    64,478.42x = 3,748,253,852.81
  5. Step 5: Solve for x
    x = 3,748,253,852.81/64,478.42
  6. Step 6: Final answer
    x = 58,131.91

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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.