Home / 85,433,145.80-128,118,225.90-42,288,009.80

Finding the Fourth Proportional to 85,433,145.80, 128,118,225.90 and 42,288,009.80

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Solution

The fourth proportional to 85,433,145.80, 128,118,225.90 and 42,288,009.80 is: 63,416,426.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,433,145.80 : 128,118,225.90 = 42,288,009.80 : x
  2. Step 2: Convert to fraction form
    85,433,145.80/128,118,225.90 = 42,288,009.80/x
  3. Step 3: Cross multiply
    85,433,145.80x = 128,118,225.90 × 42,288,009.80
  4. Step 4: Simplify right side
    85,433,145.80x = 5,417,864,792,417,814
  5. Step 5: Solve for x
    x = 5,417,864,792,417,814/85,433,145.80
  6. Step 6: Final answer
    x = 63,416,426.28

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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.