Home / 90,518,123.80-135,864,873.47-85,602,294.56

Finding the Fourth Proportional to 90,518,123.80, 135,864,873.47 and 85,602,294.56

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Solution

The fourth proportional to 90,518,123.80, 135,864,873.47 and 85,602,294.56 is: 128,486,367.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,518,123.80 : 135,864,873.47 = 85,602,294.56 : x
  2. Step 2: Convert to fraction form
    90,518,123.80/135,864,873.47 = 85,602,294.56/x
  3. Step 3: Cross multiply
    90,518,123.80x = 135,864,873.47 × 85,602,294.56
  4. Step 4: Simplify right side
    90,518,123.80x = 11,630,344,919,136,070
  5. Step 5: Solve for x
    x = 11,630,344,919,136,070/90,518,123.80
  6. Step 6: Final answer
    x = 128,486,367.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.